Sorry for bringing this thread back up . But it’s quite important, as the performance difference between the two HW vendors can be quite substantial (~35%) even with GPUs that are otherwise comparable performance wise. With Unreal Tournament in development, it’d be good if there wasn’t some huge artificial performance difference due to what are basically proprietary steps taken by Nvidia., i.e., if things were more vendor neutral.
Of course, if UE4 supported Mantle the problem would be solved.