Bambu Lab P1S vs Prusa MK4S: Closed Ecosystem vs Open Source
The Bambu Lab P1S wins for most users who want fast, reliable prints out of the box with multi-material support. The Prusa MK4S is the better choice for users who value open-source firmware, dimensional accuracy, and community-driven development over raw speed.
Head-to-Head Comparison
| Category | Winner | Why |
|---|---|---|
| Print Speed | Bambu Lab P1S | The P1S reaches 500mm/s with 20,000mm/s² acceleration on its CoreXY kinematics. The MK4S is a bed-slinger limited to around 200mm/s for quality prints. For functional parts where speed matters, the P1S finishes in roughly half the time. |
| Print Accuracy | Prusa MK4S | Independent testing (CNC Kitchen) measured the MK4S at an average deviation of 0.067mm and a maximum of 0.162mm. The P1S is accurate but Prusa's loadcell-based first layer calibration and 360° cooling produce more dimensionally precise parts, especially for engineering applications. |
| Multi-Material | Bambu Lab P1S | The P1S supports the AMS system for up to 16 colors with automatic filament switching. The MK4S supports the MMU3 for up to 5 filaments. The AMS is more reliable and handles more materials, though both produce significant waste on color changes. |
| Enclosed Printing | Bambu Lab P1S | The P1S comes fully enclosed with an activated carbon filter, making it suitable for ABS, ASA, and PC printing out of the box. The MK4S is open-frame; an enclosure is available as a paid add-on. For high-temp materials, the P1S is ready on day one. |
| Firmware and Ecosystem | Prusa MK4S | The MK4S runs open-source Marlin-based firmware with full community access to source code, custom modifications, and third-party integrations. The P1S runs proprietary Bambu firmware — reliable but locked down. Prusa publishes CAD files, firmware source, and encourages modification. |
| Material Versatility | Prusa MK4S | The MK4S Nextruder high-flow hotend pushes 24mm³/s volumetric flow and reaches 290°C, handling carbon-filled filaments, nylons, and engineering materials with its hardened nozzle option. The P1S handles most materials but the Nextruder's flow rate gives it an edge for filled filaments. |
Which Board for Your Project?
| Use Case | Recommended | Why |
|---|---|---|
| Multi-color figurines and models | Bambu Lab P1S | AMS system handles up to 16 colors reliably. Faster print speeds mean a 12-hour multi-color print finishes in 6-8 hours. |
| Engineering prototypes with tight tolerances | Prusa MK4S | Superior dimensional accuracy (0.067mm average deviation) and open-source firmware let you fine-tune profiles for specific materials and geometries. |
| ABS and high-temp material printing | Bambu Lab P1S | Built-in enclosure and carbon filter handle ABS fumes without any modifications. The MK4S needs an aftermarket enclosure. |
| First 3D printer on a budget | Bambu Lab P1S | Frequently discounted below MSRP (vs MK4S kit at $799). Faster setup, less tuning required, and the enclosed design is more forgiving for beginners. |
| Open-source or educational use | Prusa MK4S | Full source code, published CAD files, and a decade-long track record of community-driven development. Schools and makerspaces often prefer the transparency. |
Where to Buy
Final Verdict
The Bambu Lab P1S is the better printer for most people — it prints faster, comes enclosed, and supports more colors out of the box. The Prusa MK4S earns its premium for users who need dimensional accuracy, open-source firmware, or plan to modify their machine. If you value speed and convenience, buy the P1S. If you value accuracy, repairability, and community, buy the MK4S.
Frequently Asked Questions
Is the Bambu Lab P1S worth $300 more than the Prusa MK4S kit?
At MSRP ($699 vs $799 kit), the P1S is actually cheaper. Bambu frequently discounts it further. The P1S includes an enclosure that Prusa charges extra for, so the total cost gap is even wider.
Can the Prusa MK4S match Bambu speeds with Klipper?
No. The MK4S is a bed-slinger — the bed moves on the Y axis, and bed mass limits acceleration regardless of firmware. CoreXY designs like the P1S move only the lightweight toolhead, enabling higher speeds and acceleration.
Which has better customer support?
Prusa has legendary customer support with fast email responses and a knowledge base built over a decade. Bambu Lab support is adequate but newer and less proven. For self-service troubleshooting, Prusa's community forums are unmatched.
Can I use third-party filament with both?
Yes. Both printers accept standard 1.75mm filament from any manufacturer. The Bambu AMS uses RFID tags on Bambu-brand spools for automatic settings, but it works fine with third-party filament using manual profiles.
Which is quieter?
The Bambu P1S at 49dB is quieter than the MK4S in normal operation. The P1S enclosure helps dampen noise. Both are significantly quieter than older printers thanks to TMC stepper drivers.
Do both support OrcaSlicer?
Yes. Both work with OrcaSlicer, which has excellent profiles for each. Bambu also offers Bambu Studio, and Prusa offers PrusaSlicer. OrcaSlicer is the community favorite for both machines.
Which holds its resale value better?
Prusa machines hold resale value better due to the open-source ecosystem, upgradability, and Prusa's long-term support commitment. Bambu printers depreciate faster as new models release, though they remain excellent value used.