Here's my wife's '07 MINI Cooper S sitting in the garage next to my smart.
Seriously, there is no comparison. The MINI is a driver's car, the smart is a cute, tiny economy car.
She loves her MINI. She routinely gets 32-35 measured mpg with it. It's turbo-charged, handles like it's on rails, has phenomenal brakes, and it just a hoot to drive.