What about rumors about the existence of other versions of Navi21 with HBM2? The memory bandwidth level for tandem from HBM2 and Infinity Cache is very interesting. Maybe this option will appear in Apple Mac Pro systems.
Vega20 vs Vega10 in Compubench
https://compubench.com/compare.jsp?benchmark=compu20d&did1=64197418&os1=Windows&api1=cl&hwtype1=dGPU&hwname1=AMD+66A0%3A00&D2=AMD+Radeon%28TM%29+RX+Vega