Mid Size Scooter vs Large Sport Scooter

[mamascoot]

My son will be moving into the city for college and we were thinking it would be better for him to buy a scooter instead of a car. Easy to park, less gas and easy to ride. It will be mostly city driving but there may be the occasional trips into the hills. Do you suggest we invest in a mid-size or large scooter (I know he'd like the sporty look but I'm trying to be practical).