NVIDIA 387.34 vs. Linux 4.15 + Mesa 17.4-dev Radeon OpenGL/Vulkan Performance
Dawn of War 3 with RADV Vulkan leaves much room for improvement, but at least the OpenGL RadeonSI performance is running very well.
F1 2017 is the first Vulkan-exclusive Linux game. RADV is still maturing and it shows in these results.
F1 2917 at 4K shows stronger performance out of NVIDIA than RADV Vulkan.