For what it's worth Branch is standing closer to the camera than at least Dexter, as can be seen by the overlapping elbows. Don't know how big a difference this would make to apparent size.
hahahhaa, i love all the excuses with you clowns, "standing closer", "Dex is at a weird angle", "the moon is in full harvest" and all the other bullshit, face it Branch is bigger and more shredded than everyone else.