Umm I've owned 3 and flashed them to 64 and 64 liquid, is a well known and easy thing to do. The missing shaders make 2% difference, max, in a very small amount of games
Even had a 64 and 56 flashed in crossfire beating 2080ti scores
Looks like it brings it to just under a STOCK Vega 64 to me. It's most certainly not a Vega 64 or worth been called that, you can make a card look like anything in the bios.