According to the previous benchmark and results from the gamers, Vulkan provides a better frames rate which is almost about 5% higher than direct x 12 but direct X 12 offers a smoother experience overall it is more consistent in nature but the benchmark put it slightly behind the Vulkan.
Vulkan is intended to provide a variety of advantages over other APIs as well as its predecessor, OpenGL. Vulkan offers lower overhead, more direct control over the GPU, and lower CPU usage.