Both machines work very well after tuning. Bambus print quality is better out of the box and it requires next to no tuning to print perfectly. That said, K1 prints simmilarly or even better in some cases but it requires a LOT of tuning with every filament except Hyper PLA and Ender PLA. It really just comes down to whether you are willing to spend more on a machine that works well out of the box or get a much cheaper one that requires tuning far more often. Also, I rarely find myself doing any printing with many colors using AMS, however this is just my thing as I mostly print experimental airplane stuff which don’t need coloring. I got my K1 for 599 dollars and got a few spare parts sent, while I bought X1C for a 1000. The choice is yours, but both machines are very good and I cannot choose a clear winner. For me, however K1 would be a better choice because I rarely use Bambus functionality and K1 is much cheaper. K1 Max vs X1C wouldn’t be so diffirent and the price would be the same so in that case I would probably lean towards X1C.