Direct answer: buy the Bambu Lab X2D if you are shopping new between these named models. QIDI now says the Plus4 is discontinued, no longer in production, and sold out. Consider a Plus4 only as a condition-verified used or remaining-stock machine when its 305 x 305 x 280 mm capacity materially changes the work.
Recommendation: choose the current X2D when its separate-nozzle workflow repeatedly saves support cleanup, material swaps, purge waste, or operator time. Consider a legacy Plus4 only when real files or useful batches require its larger envelope and the exact unit passes condition, seller, return, warranty, parts, and support checks.
The X2D size caveat remains nozzle-specific: Bambu lists 256 x 256 x 260 mm for main-nozzle printing but 235.5 x 256 x 256 mm for auxiliary- or dual-nozzle printing. If you want a current new QIDI, QIDI identifies Plus5 as the direct successor; compare it separately rather than carrying Plus4 dimensions, condition, or ownership terms forward.
The decision in 30 seconds
Buy the X2D if: support interfaces, rigid-plus-flexible combinations, or frequent color changes create enough labor or waste to justify a dual-nozzle machine.
Consider a used or remaining-stock Plus4 if: jobs repeatedly require its 305 mm capacity and the exact machine passes lifecycle, condition, support, and risk-adjusted price checks.
Delay either purchase if: your next ten jobs neither use the second nozzle nor exceed the smaller build envelope. That is an upgrade looking for a problem.
Disclosure: GoodPrints may earn a commission from qualifying links on this page. This comparison uses current manufacturer-published specifications and claims; it does not claim hands-on testing.
Quick comparison
| Decision point | Bambu Lab X2D | QIDI Plus4 |
|---|---|---|
| Current purchase status | Current official X2D product page with an active purchase path | Official Plus4 page says discontinued, no longer in production, and sold out; evaluate used or remaining stock only |
| Manufacturer-listed print zones | Main nozzle: 256 × 256 × 260 mm Auxiliary or dual nozzle: 235.5 × 256 × 256 mm |
305 × 305 × 280 mm |
| Nominal X-Y area | 65,536 mm² | 93,025 mm², about 42% more |
| Manufacturer-listed machine body | 392 × 406 × 478 mm; Bambu recommends 500 × 700 × 850 mm printer space | 505 × 487 × 550 mm; QIDI lists body dimensions, not a complete operating-clearance envelope |
| Tool workflow | Dual-nozzle system | Single toolhead; QIDI Box compatible |
| Manufacturer-listed chamber headline | Up to 65 °C active heating | 65 °C active heating |
| Primary reason to buy | Support and material separation without moving to a larger flagship | Larger one-piece parts and denser batches |
| Main overbuy risk | Paying for a second nozzle that real jobs rarely use | Buying extra volume that becomes bench footprint rather than output |
| Best proof | Measured cleanup, swap, or waste savings across repeat jobs | Real files that do not fit, or batch layouts that use the larger plate |
Where the Bambu Lab X2D wins
The X2D wins when the second nozzle changes accepted output. Bambu presents its system around cleaner support removal, faster color changes, and combinations such as rigid and flexible materials. Those benefits are not automatic: the paired materials, nozzle assignments, temperatures, adhesion, and part geometry still need a qualified process. But a real support-interface or material-separation workflow is a stronger reason to buy than a vague interest in multicolor.
Its 256 × 256 × 260 mm volume also keeps the machine in a familiar desktop class. When jobs already fit, the smaller envelope is not a deficiency. It can be the more efficient choice because the purchase concentrates on workflow rather than unused capacity. Read the X2D review and the X2D build-volume guide before assuming the plate is too small.
Where a used QIDI Plus4 can still win
A condition-verified Plus4 can still win on usable room. Its listed 305 x 305 mm plate adds 49 mm on each X-Y axis and roughly 27,489 mm2 of nominal area. That can prevent a housing, jig, guard, tray, or panel from being split, or fit more useful copies per plate. The capacity advantage is real; the current-purchase advantage is not, because QIDI's official page now marks the Plus4 discontinued and sold out.
The larger number is not a throughput guarantee. Brims, supports, orientation, purge behavior, thermal behavior, and safe edge clearance reduce usable capacity. A bigger plate can also create longer failure exposure and a larger cleanup wave. Use the Plus4 build-volume guide and the QIDI Plus4 review to test whether the extra room changes the queue.
Both have active chamber heating, so materials need a narrower test
The older version of this comparison treated the Plus4 as the obvious heated-chamber branch. That is no longer a clean distinction. The current X2D store page lists a 300 °C nozzle and 65 °C actively heated chamber. QIDI's current Plus4 page headlines 65 °C active chamber heating and a toolhead intended for higher-temperature materials.
Those claims do not prove equal results with every ABS, ASA, nylon, polycarbonate, or filled grade. Validate the exact filament maker's temperature, drying, enclosure, nozzle-wear, ventilation, and surface guidance. Then run representative geometry under one acceptance standard. For narrower routes, use X2D engineering-material fit or Plus4 ABS and ASA fit.
Check the dual-nozzle zone and the complete workspace
Run two fit checks, not one. First, slice the largest support-interface or two-material job against the X2D's documented 235.5 × 256 × 256 mm auxiliary and dual-nozzle zone; use the full 256 × 256 × 260 mm headline only for main-nozzle work. Then slice the same geometry and representative batches on the Plus4's 305 × 305 × 280 mm volume. The X2D build-volume guide and Plus4 build-volume guide keep that size question separate from the broader ownership decision.
Second, measure the complete cell. Bambu lists the X2D body at 392 × 406 × 478 mm and recommends 500 × 700 × 850 mm of printer space. QIDI lists the Plus4 body at 505 × 487 × 550 mm. Body dimensions are not identical to operating clearance: allow for door swing, lid and service access, cables, ventilation, spool handling, and the exact AMS or QIDI Box layout. The Plus4's larger printer body is a real capacity tradeoff; the X2D's smaller body does not erase its filament-system placement needs.
Run a ten-job constraint audit
List the next ten jobs you are genuinely likely to print. Record the oriented bounding box, quantity, material pair, support-interface area, color changes, cleanup time, split-and-join work, failed-print cost, and accepted-part requirement.
- Mark every job that exceeds 256 × 256 × 260 mm after orientation and support planning.
- Repack batch jobs on both a 256 × 256 mm and 305 × 305 mm plate.
- Mark jobs where a dedicated support or secondary-material nozzle removes a real manual step.
- Estimate purge and swap cost from the intended workflow rather than a demo file.
- Count jobs that require active chamber control regardless of which printer wins.
- Price post-processing, inspection, operator time, and failed batches.
Choose the X2D when the second-nozzle rows repeatedly create measurable value. Choose the Plus4 when the size rows repeatedly change part integrity, batch count, or delivery time. If both groups stay mostly empty, compare a simpler enclosed printer.
Multicolor and support workflow are not the same decision
The X2D's dual-nozzle architecture can reduce some color-change and support-material friction because two materials are available at the toolhead. The Plus4's QIDI Box path expands loaded-material and multicolor options, but it does not turn the Plus4 into the same tool architecture. Ask whether the need is more loaded colors, faster transitions, soluble or breakaway support strategy, or two-material part behavior. Those are different requirements.
If a single-nozzle enclosed default already covers the queue, compare the X2D vs P2S. If the larger QIDI lane still looks right but Bambu convenience matters, use the P2S vs Plus4.
The market decision changed: current X2D or legacy Plus4?
Official status check on September 21, 2026: Bambu still maintains an active X2D product and purchase page. QIDI states that the Plus4 is discontinued and no longer in production, marks it sold out, and names Plus5 as its direct successor. This is now a current-new-versus-legacy comparison, not an equal new-printer shelf decision.
For a used or dealer-held Plus4, verify: the exact variant and serial, print hours, hotend and nozzle condition, chamber-heater operation, bed and build plate, motion wear, screen and sensors, included QIDI Box hardware, firmware state, replacement-parts path, seller warranty, and return window. Add missing hardware and likely service work before comparing its risk-adjusted cost with a current X2D.
- Buy the current X2D: the dual-nozzle zone fits and a recurring separate-nozzle workflow creates measurable value.
- Consider the legacy Plus4: measured jobs need 305 mm capacity and the exact unit passes inspection at a defensible price.
- Shop the current QIDI lane: use the official Plus5 successor page and compare its 320 x 320 x 300 mm envelope, package, support, and ownership costs separately.
Price the whole ownership path
Include printer configuration, material system, spare hotend or nozzle hardware, plates, drying and storage, ventilation, failed qualification parts, maintenance, and operator time. Do not freeze the comparison around today's sale price; configurations and promotions move faster than the ownership logic.
Also include the cost of the wrong architecture. Unused plate area consumes money and bench space, while an unused second nozzle adds qualification and maintenance without returning labor savings.
The X2D can justify a higher workflow cost when accepted parts need the second nozzle every week. The Plus4 can justify a larger physical footprint when the extra area prevents splitting or produces denser useful plates. Neither pays back when the defining feature is only future-proofing anxiety.
Three buyer scenarios
Support-heavy functional parts that fit a 256 mm plate
Choose the X2D when a qualified second support material reduces scars, removal time, or inaccessible support risk. Confirm the material pair on representative parts before treating the labor saving as guaranteed.
Larger housings, trays, and fixtures
Choose the Plus4 when actual oriented files exceed the X2D envelope or splitting creates weak joints and extra finishing. The larger plate is a defensible requirement here, not a spec-sheet trophy.
A small shop expecting both needs
Rank the constraints by monthly cost. If large parts are occasional but support cleanup is daily, start with the X2D and outsource oversized work. If most revenue depends on larger one-piece parts, start with the Plus4 and outsource the minority dual-material jobs. A second machine should follow measured overflow, not imagined completeness.
When another printer makes more sense
- The Plus4 is larger than your actual jobs require: compare the X2D vs QIDI Q2 for the dual-nozzle decision against a more compact 270 mm heated-chamber path.
- You want a different roughly 300 mm heated-chamber alternative: compare the X2D vs Creality K2 Pro for dual-nozzle workflow against 300 mm enclosed capacity.
- You want a larger Bambu dual-nozzle platform: compare the X2D vs H2D.
- You want an even larger enclosed capacity branch: compare the Plus4 vs Creality K2 Plus.
- You are unsure the dual-nozzle premium is warranted: read Who Should Buy the X2D?
- You are unsure the larger QIDI is warranted: read Who Should Buy the Plus4?
Choose the next step
- If larger enclosed capacity still looks like the real constraint, compare the Plus4 with the Creality K2 Plus. If that capacity is intermittent rather than recurring, use the buy-versus-service checkpoint before adding another production cell.
- If finished parts matter more than adding another machine right now, use the small-batch production-fit guide to qualify quantity, finish, inspection, delivery, and repeat-order needs. Ask JC Print Farm while process, material, tolerance, or repeatability still needs review. Once the file revision, quantity, material and finish, critical dimensions, acceptance checks, delivery target, and timing are defined, use the quote-preparation checklist, then request a scoped quote.
Final recommendation
Buy the Bambu Lab X2D when shopping new and when dual-nozzle workflow is the recurring constraint. It is the lower-risk current purchase for support and material-separation jobs that fit its documented nozzle-specific zone.
Consider a used or remaining-stock QIDI Plus4 only when capacity is the proven constraint. Its 305 x 305 x 280 mm volume can still be valuable, but lifecycle, condition, support, and total acquisition risk now belong inside the recommendation.
Frequently asked questions
Does the QIDI Plus4 have a hotter chamber than the X2D?
Not by the current headline specifications. Bambu lists up to 65 °C active chamber heating for the X2D, and QIDI headlines 65 °C active chamber heating for the Plus4. Validate exact material and operating conditions rather than choosing on that shared number alone.
How much larger is the Plus4 build plate?
The Plus4 is listed at 305 × 305 mm versus 256 × 256 mm for the X2D. That is 49 mm more on each axis and about 42% more nominal X-Y area.
Is the QIDI Box the same as the X2D dual-nozzle system?
No. QIDI Box compatibility expands loaded-material and multicolor workflow for the Plus4, while the X2D uses two nozzles at the toolhead. Compare the exact support, color, and material process you intend to run.
Does the X2D keep its full 256 mm width in dual-nozzle mode?
Not on Bambu's current specification. The main-nozzle zone is listed as 256 × 256 × 260 mm, while auxiliary-nozzle and dual-nozzle printing are listed as 235.5 × 256 × 256 mm. Use the smaller documented zone when the second nozzle is part of the job.
Can you still buy a new QIDI Plus4 from QIDI?
Not from the official listing reviewed September 21, 2026. QIDI says the Plus4 is discontinued and no longer in production, marks it sold out, and directs shoppers to Plus5. Dealer inventory can differ, so verify whether a listing is genuinely new and who provides warranty, return, and replacement-parts support.
Should a new buyer compare the X2D with QIDI Plus5 instead?
Yes, if the goal is a current new-printer decision. Keep this page for evaluating a specific Plus4 or an existing machine; compare Plus5 separately because its 320 x 320 x 300 mm envelope, package, terms, and ownership case are not interchangeable with Plus4.