Let's do this thing.
1: We both share body shape pretty closely, he's just bigger overall.
2: We're both Engineers. He's just got a more fun job.
3: We're both wildly eccentric personalities, with a lot of Tenth doctor style ramblings.
4: We both love art and music far in excess of our actual abilities in those regards. Both cases, it's genetic.
5: We both have a bad caffiene problem, again, genetic. But we do our best work after a liter of mountain dew.

A: Tohri is athletic and in much better shape than I am, even by Iro standards. (Big surprise)
B: I'm probably a lot more malicious and crafty than he is by a wide margin. Manipulative and attentive too.
C: Dispite being a herm, he's less sexually active than I am, and less 'Gay' overall. (Not that I'm that gay to begin with. You know who you are.)
D: As far as social behavior, he's narrower than I am, less outgoing and quiter socially in general. Bordering on social recluse/Awkward with girls.
E: I'm also better rounded in terms of world knowledge/skill set, but not as talented at fabrication and design. And if you know me, that's saying something.