AMDGPU-PRO 17.20 Benchmarking vs. RadeonSI/RADV
ET: Legacy appears ever so slightly faster with AMDGPU-PRO 17.20, but RadeonSI is still much faster.
The OpenArena results were a wash between the drivers.
Serious Sam 3: BFE Fusion 2017 with OpenGL is faster on RadeonSI over the PRO driver.
With Serious Sam 3 Fusion using Vulkan, RADV managed to come out slightly ahead of the currently-proprietary Vulkan AMDGPU-PRO driver.
Even when running Serious Sam 3: BFE with ultra image quality settings, RadeonSI and RADV remained faster than the hybrid driver.