The feature that they have in common is that both are the same note for this reason they sound very alike
The sculptor was following a Roman tradition at the time to portray emperors as other-worldly, almost godlike beings. He makes his eyes very large and his face stoic to convey that he his someone not quite human like the rest of us, and perhaps he is above the fleeting emotions that govern the rest of mankind.
It depends but if you're asking for my opinion, then I will believe with those people who thought that it indicates the body is from the apostle Peter because it's based on my religious belief. The archaeologist can be true, so it just depends on your beliefs.