don't take it personally, tadpole. There are always a lot of stuff you can fix on your work - especially with replications. Instead of dodging his crit saying he's 'thinking of the wrong sculpture' try taking another look and see if you can refine what he mentioned.

You haven't captured the likeness yet. Keep working

as far as the marble shader goes, I think you're quite right in that it detracts from the model. Loosen the specular highlight and bring the intensity down a bit and it'll look a bit more natural imo.