The difference is that Roman sculpture is revered for it's ingenuity and craftmanship at a time where that style of sculpture was being developed with the more

The difference is that Roman sculpture is revered for it's ingenuity and craftmanship at a time where that style of sculpture was being developed with the more limited resources they had back then, and it often depicted important motifs from religion, society, etc. Whereas this is just a copy of that with limited cultural relevance (no one is going to be talking about Priscilla Chan in 20 years, let alone a couple thousand).