Most people will tell you there is no difference between AMDVLK drivers and RADV but clearly there is since RADV is what Valve uses for the Steam Deck. Heres a great video comparing the three options AMD has for linux.
https://www.youtube.com/watch?v=UAIzRlhvijU
I personally chose RADV after looking into this myself and the only drawback from my understanding is that they are proprietary drivers. Do not use AMDGPU-PRO ever though.
As far as I was aware AMDGPU is used by default on most if not all distros so I still think its a bit confusing to decide which to use for your needs at first unless you check the video I linked. I noticed a performance increase after forcing RADV on NixOS so not really sure.
Sidenote why cant AMDGPU and RADV combine their efforts to simplify and rename AMDGPU-PRO to AMDGPU-unfree because that itself is confusing since most people will be drawn to use the PRO version without realising the worse performance.