As shared elsewhere, I've used Arch Linux since 2017 sometime, and this year I replaced it with CachyOS as I was changing disks anyways and wanted to see what all the noise was about.

It's like a Arch brother that holds your hand slightly more, and have some "defaults" they nudge you towards in the docs, and some number-heavy software is slightly faster, maybe 10-15%, but overall it feels and works just like Arch Linux. To be honest, I don't notice a lot of difference and I think I'm as fine with Arch as with CachyOS, that's how little different there is between them.