| Category | Winner | Why |
|---|---|---|
| Drying Capability | Bambu Lab AMS 2 Pro | The AMS 2 Pro has built-in active drying — PTC heater plus circulation fan keeps the chamber at 30-65°C with dual humidity sensors. The original AMS has passive desiccant only, which saturates within weeks in humid climates. For PETG, nylon, TPU, or PA-CF, this difference is the entire reason the AMS 2 Pro exists. |
| Purge Waste | Bambu Lab AMS 2 Pro | The AMS 2 Pro's redesigned cutter produces 80-120mm³ of purge waste per color change vs the original AMS's 100-150mm³ — a 20-30% reduction. On a 200-color-change cosplay print, that saves 4-6g of filament. Small per-print but adds up over hundreds of multi-color prints per year. |
| Capacity & Daisy-Chaining | tie | Both AMS versions hold 4 spools (250g-1kg each) and daisy-chain up to 4 units for 16 colors. They're cross-compatible — you can mix AMS 2 Pro and original AMS in the same chain. Capacity is identical; the AMS 2 Pro doesn't sacrifice anything to add active drying. |
| Desiccant Maintenance | Bambu Lab AMS 2 Pro | The AMS 2 Pro uses regenerable desiccant — bake it in an oven at 120°C for 2 hours and reuse indefinitely. The original AMS uses replaceable silica packets ($15-20/year in supplies). Over 3 years, the AMS 2 Pro saves $45-60 in desiccant alone, not counting the convenience of never running out. |
| Compatibility | tie | Both work with P1S, P1P, X1C, and X1E. Neither works with the A1 series — A1 owners need AMS Lite (passive) or AMS HT (active drying for A1). The AMS 2 Pro adds H2D support which the original AMS doesn't have, but both versions cover the most popular Bambu printers identically. |
| Price & Value | Bambu Lab AMS | At $249, the original AMS is $100 cheaper than the AMS 2 Pro ($349). For PLA-only users in dry climates, that $100 buys nothing — PLA is barely hygroscopic and the original AMS handles it perfectly. The premium is only justified if you actually print materials that need active drying. |
Data from PAM Finds