DirectX 11 vs Vulkan: which is best for Baldur's Gate 3?

DX11 if you havean nvidia card, vulkan if youre amd.

According to digital foundry's analysis, DX11 is always either better or the same, unless you are CPU-limited.

new default is DX11, even EA benchmark only show like 1~2% gain for AMD cards. I've played between both and honestly I can't really see any difference. (6800XT with 3900X full amd build.)