RADV is the default community Mesa driver, made by Valve engineers.
AMD's own Vulkan implementation is called AMDVLK, which is just a port of their Windows Vulkan libraries repackaged for Linux. AMDVLK usually moves faster than RADV and got raytracing much earlier. And even though RADV added raytracing as well, RADVs raytracing is much slower than AMDVLK. Maybe this changes will finally close the gap?