AMDGPU-PRO 17.20 Benchmarking vs. RadeonSI/RADV

Thanks to this week's Radeon Vega Frontier Edition launch, AMD pushed out a new build of their hybrid driver stack for Linux, AMDGPU-PRO. This new release is marketed as AMDGPU-PRO 17.20 and is only found when looking for the Frontier driver, but it's been working out fine so far in my Polaris/Fiji GPU testing. Here are some benchmarks compared to their current stable series, AMDGPU-PRO 17.10, as well as the newest open-source AMDGPU+RadeonSI/RADV driver stack.