Ubuntu 19.10 Radeon Linux Gaming Performance Plus Linux 5.4 / Mesa 19.3 Benchmarks
For the Hitman native Linux game port with OpenGL, using Mesa 19.3 + Linux 5.4 did lead to slightly higher frame-rates.
With Hitman 2 that runs on Linux via Steam Play and rendered using DXVK/Vulkan, the Vega graphics cards were at their best with Linux 5.4 and Mesa 19.3.