AMDGPU-PRO 16.50 vs. Mesa 13.1-dev + Linux 4.9 Radeon OpenGL
Metro Last Light Redux for a while now has been faster with RadeonSI over AMDGPU-PRO.
Mesa 13.1-dev meanwhile is faster than AMDGPU-PRO with the open-source Tesseract game.
The Xonotic performance is close between the two Radeon Linux drivers while with the R9 Fury the fully open code does a better job.