AMDGPU-PRO 17.10 vs. Linux 4.12 + Mesa 17.2-dev Git
Linux 4.12 and Mesa 17.2-dev are also much better with DiRT Rally than the AMDGPU-PRO 17.10 hybrid driver for this racing game.
Dota 2 with OpenGL favors the open-source driver. See last week's Vulkan benchmarking for the cross-driver comparison there.
The open-source ET: Legacy project letting Enemy Territory live on is also doing better with RadeonSI.
Mad Max also does much better with RadeonSI over the proprietary AMD OpenGL driver.