RadeonSI on Mesa Git is maintaining a lead over AMDGPU-PRO with the demanding Unigine Heaven benchmark.
And even for the newer Unigine Superposition benchmark, RadeonSI is beating out AMDGPU-PRO.
So overall, RadeonSI continues to dominate over AMDGPU-PRO for OpenGL performance. The Vulkan performance might still be a different story, but the 17.30 Vulkan driver build was broken. Once I get that working, fresh tests there. It will also be interesting to see how the Radeon RX Vega performance compares between drivers, which I'll do once I have my hands on the new hardware. If you missed it, see the Linux driver expectations for the Radeon RX Vega.