OpenGL vs. Vulkan Linux Gaming Performance Ending Out 2017
Mad Max at 1080p saw the NVIDIA Vulkan performance basically on-par with the NVIDIA OpenGL performance while there still is another ~20% more performance that could be obtained out of RADV to make it competitive with RadeonSI OpenGL.
Mad Max at 4K saw the NVIDIA Vulkan performance begin to run faster than the OpenGL results while the RADV performance remained short of RadeonSI.