NVIDIA 375.10 vs. Linux 4.8 + Mesa 13.1-dev AMD GPU Benchmarks
With Metro Last Light Redux at 1080p, all tested Radeon cards -- including the RX 480 and R9 Fury -- came up short of the GTX 950.
The red side is at least fairly competitive with the Tesseract open-source game.
And RadeonSI does really well when it comes to the Xonotic first person shooter game, which we've seen for a while now.