Phoronix published a review on the Unreal Engine 4 Linux Tests With AMD & NVIDIA Graphics Drivers
A quote from the article:
This week there was a 22-way graphics card test of Metro Redux on Linux using GeForce and Radeon hardware with the latest AMD and NVIDIA proprietary drivers. Today the newest Linux gaming test candidate to look at is the AMD/NVIDIA Linux performance with the latest Unreal Engine 4 demos. In this article is a look at the UE4 Linux performance on AMD and NVIDIA graphics hardware running with Ubuntu.Unreal Engine 4 Linux Tests With AMD & NVIDIA Graphics Drivers @ Phoronix