AMD Radeon RX 5500 XT 8GB Linux Gaming Performance
The Linux-native OpenGL-using HITMAN game performed the same even with the doubled vRAM. At 1080p even with ultra quality settings these Linux games weren't enough to use more than the 4GB of GDDR6 video memory.
HITMAN 2 runs on Linux via Steam Play including DXVK for translating from Direct3D to Vulkan. The performance here was still the same between the two versions.
No surprises out of Rise of the Tomb Raider, the Feral-ported Tomb Raider game, with the performance coming in as the same.