I recently built a new pc and since I switched from Windows to Lunux (Kubuntu) I got an amd gpu (6700 XT). Because people told me it is less of a hassle than Nvidia. It works fine out of the box, but the choice of drivers confuse me. For gaming is the default amdgpu good enough? Is amdgpu-pro the same as the official Radeon drivers from amd? Are they better for gaming? Is Mesa yet another driver or something in addition to a driver? Why are there no settings/gui anywhere (using the default amdgpu)?
To my knowledge, you are mostly correct. The AMDGPU-Pro driver is mostly user space implementation similar to MESA, but the reason I listed it as a kernel driver is because it injects closed source binary blobs into the kernel thereby extending AMDGPU functionality and tainting it.
ie. AMDGPU-Pro requires using DKMS or AKMOD where regular AMDGPU does not