I think Luigi is beginning to win gaming's most famous sibling rivalry award. Not only can he jump higher, but his place serves pizzas, burgers, and kebabs [via Geekologie]:
I would never have figured Mario for a baker. Actually, this finally explains Yoshi's Cookie.
I am betting they are a fantastic team. Mario Makes buns for Luigis Burgers. He just passes them through a little slot in the wall dividing the two places.