With twins I'm pretty sure one always ends up smarter than the other
Would make sense for me, my 1 brother is a genius in math and does robotic engineering (or something like that, he wires his own robots with chips and stuff) as a major, and the other has an extremely short temper (die once in COD, slam hand through wall and scream obscurities without mic on) and never thinks before acting. And they are twins.