Now, I only have Mario Kart for the Wii. It's good too, it just has some control issues, especially if you're trying to use the Wii Wheel. Protip: Don't use the Wii Wheel, unless you just really want to handicap yourself.
But the wheel's issues are half the fun . I forgot about the Wii version, definatly one of the better party games around. I was really happy to see they included Diddy Kong, the best member of the Kong family.