Bambu Lab P1S vs Prusa MK4S: Which Premium 3D Printer Should You Buy?

Both printers produce excellent print quality — this is a genuine tie for PLA and PETG. On dimensional accuracy, both measure within 0.1 mm of target on calibration cubes. Surface finish at comparable speeds (200 mm/s) is virtually identical. Where the P1S pulls ahead is ABS, ASA, and Nylon, where the enclosed chamber eliminates the warping and delamination that the open-frame MK4S struggles with without a DIY enclosure.

The P1S wins clearly. Both are rated at 500 mm/s max, but the P1S maintains quality at 300–400 mm/s in real-world use. The MK4S produces best results at 150–200 mm/s despite the high spec. On a practical 100g benchmarking part, the P1S finished in 1h 22m vs the MK4S at 2h 48m.

The P1S dominates on engineering materials. Its sealed chamber with active heating handles ABS, ASA, and Nylon without warping. The MK4S with its open frame struggles with ABS — temperature fluctuations cause layer separation on larger prints. For PLA, PETG, and TPU, both perform equally. If you print ABS or engineering filaments, the P1S is the clear winner.

The MK4S wins on long-term reliability and repairability. Prusa's track record spans 10 years — the MK4S is the descendant of printers that have run in schools, businesses, and maker spaces worldwide. Every component is available as a spare, and the community has documented every possible failure mode. The P1S is newer and excellent, but doesn't have this proven track record yet.

A genuine tie — each has a major advantage. Bambu Studio is the most polished slicer and includes remote monitoring and one-click profiles. PrusaSlicer is fully open-source, works with any printer, and has more advanced print customization options. Bambu's ecosystem locks you in; Prusa's works with everything.

Both support multi-color via optional add-ons. The Bambu AMS ($249, 4 colors) integrates more seamlessly with Bambu Studio and has a faster color-change mechanism. The Prusa MMU3 ($299, unlimited spools but 5 actively loaded) is more versatile but slower to change. The AMS is the better system for most users; the MMU3 suits those who need more than 4 active colors.

At $599 vs $549, the P1S costs $50 more but delivers enclosed printing and faster speeds. For the capabilities offered, the P1S has slightly better value. However, the MK4S justifies its price through longevity and repairability — a Prusa printer bought today will likely still run in 8 years with minor part replacements.