[GreenHeuristics]

Often it has been that Vulkan is closer to how GPUs work simply due to GPU manufacturers having to change their GPUs to work well with Vulkan. To for example add a co-processor to the GPU so that it can do job scheduling in a more Vulkanish way.

Vulkan was after all a spec from one GPU manufacturer (AMD), there are a handfull others with their own archs developed with their own assumptions.

[cma]

Mantle was the single GPU manufacturer API, Vulkan was based on Mantle, but its creation had input from all the major vendors including Nvidia.

[GreenHeuristics]

'had input' = can be accepted, not 'is also based on'