34-Way Graphics Card Comparison On Ubuntu 17.10
OpenArena at 1080p is running much faster on the NVIDIA 387.22 driver than under the latest Radeon open-source driver. The RX Vega cards were only running with the GTX 950~1050 while the Radeon RX 580 was slower than a GeForce GTX 760. But keep in mind with this game it's already running in the hundreds of frames per second.
Also notable with these OpenArena results is the RadeonSI OpenGL driver having a much higher peak frame time than the NVIDIA graphics cards tested.