AMD Radeon RX 590 Linux Benchmarks, 18-Way NVIDIA/AMD Gaming Comparison
Dota at 4K with Vulkan becomes CPU bound with the higher-end GPUs, but at least is interesting for looking at the RX 590. In this configuration the game was 10% faster with the RX 590 over the RX 580.
Dawn of War III with Vulkan on Linux could run on the RX 590 up to 1440p ultra quality settings while striking a 60 FPS average. In this configuration the RX 590 was 13% faster than the RX 580.
The RX 590 allowed running Metro Last Light Redux with more headroom above 60 FPS when at 4K.