According to your charts the 295X2 is 24% faster than the Fury-X and the Vega 64 is ~27% faster than the Fury-X. That makes the Vega 64 comparatively faster than the 295X2.Please calculate all the numbers for the Vega 64, and come with the figures. In the worst case the difference is 2%ish.
Yes that's only ~3% but you said the Vega 64 "is not faster than Radeon R9 295X2" not that it wasn't more than a few % faster.