RADV vs. AMDGPU-PRO Vulkan Performance vs. OpenGL In May 2017
The Talos Principle is faster with Vulkan than OpenGL and between RadeonSI and AMDGPU-PRO GL it shows competitive performance (ignoring the RX 580 regression).
The Serious Sam 2017 results show RadeonSI could use some optimizations when run at low quality settings relative to the other runs.