Dark hair, for starters. You're a ginger, and your face is a little longer -- and his glasses are round, yours are a little more triangular. Hey, but don't be sad, that's actually pretty normal? Quill and the Quill I know, and I heard I don't look like the next Peter Parker either.

(because there are plenty to go around, but, yeah, see??? it's normal.)

Also, you're a bit too old to be the twins, man.