Happy birthday!!
I have more posts, more online time, more real-life time, more body mass (I guess) and more hair. He has to be the Anti.
Negative. Antimatter is identical to matter, only reverse. Ergo, anti-someone can not differ in magnitude.
If we're talking supersymmetry, however, then supersymmetric opposites of the known particles are thought to be way heavier than the ones we know. So you might fit that role.
