RadeonSI Mesa 17.1-dev vs. AMDGPU-PRO 16.60 OpenGL Linux Gaming
AMDGPU-PRO was a few frames faster than RadeonSI for Team Fortress 2.
ET: Legacy with its OpenGL 3 renderer was faster with RadeonSI Mesa 17.1-dev over AMDGPU-PRO.
The OpenArena results were close to the same performance.
Tesseract was faster with RadeonSI at 1080p but at 4K had fallen a few frames behind AMD's PRO driver.