First up with Counter-Strike: Global Offensive, we find the performance to be close to the same between these two DRM drivers. However, the exception is the R9 270X and R7 370 are seeing a performance drop with AMDGPU.

With Dota 2 OpenGL, we see the R9 270X and R7 370 still regressed on AMDGPU.

And the same behavior with ET: Legacy.

Under the demanding Metro Last Light Redux game, we see better performance out of the Radeon R9 290 when using the AMDGPU driver.