HBCC made shit all difference at release on Vega and still makes shit all difference now, no dev built for their stupid architecture features because nobody bought vega
a 2070 is literally $60 more than a v64 for better compute performance (except blender/prorender), better gaming performance in literally every situation, and rt/tensor cores (but that's a fucking stupid gimmick too, so i'm not even going to hold that against the v64).