AMDGPU-PRO 17.30 vs. Linux 4.13 + Mesa Git RadeonSI Benchmarks
Even with Dota 2, RadeonSI dominates over AMDGPU-PRO on the RX 580 and R9 Fury.
Or in open-source games like ET: Legacy, RadeonSI is doing better.
AMDGPU-PRO 17.30 appears to have an OpenArena regression.