My understanding is there are two performance differences here, one is vulkan outperforming DirectX, and one is reduced overhead on linux vs windows. The Vulka

My understanding is there are two performance differences here, one is vulkan outperforming DirectX, and one is reduced overhead on linux vs windows. The Vulkan difference can actually be achieved on windows as well, by using DXVK on windows. The overhead difference is most seen on the lighter games, like Dead Cells and Hades. It's why we see such massive increases in battery life for those games.