Windows 10 vs. Ubuntu 16.04 Graphics Performance With Radeon Software, AMDGPU-PRO, AMDGPU+RadeonSI
F1 2015 was a game where the latest Radeon open-source driver works fine but AMDGPU-PRO had not. But the game on the open-source Linux driver currently runs at about one third the speed of Radeon Software.
With the Source Engine powered Insurgency game, the open-source driver performance exceeded AMDGPU-PRO but came up shy of Windows 10.
BioShock Infinite with AMDGPU-PRO was similar to the NVIDIA results where the Linux port ended up running faster than Windows 10, but when using the open-source driver stack it wound up being slower.