Verdict
Kobra 3 Combo bundles the printer with Anycubic's ACE Pro multi-material unit at $499. Bambu A1 is $399 standalone — adding AMS Lite makes it $649 total. So Kobra 3 Combo is genuinely cheaper for multi-color.
Buy the Kobra 3 Combo if: multi-color from day one is the goal, budget under $550, willing to live with Anycubic's slightly fussier ecosystem.
Buy the A1 standalone if: single-color first, multi-color is a "maybe later" upgrade, want the polished Bambu Studio + Cloud workflow.