You can't play MK8 Wii U on the go. So that's an obvious huge difference.
The game is also freaking robust as hell, just like Zelda is a huge game you can get lost in, Mario Kart 8 is the most feature filled Mario Kart ever (or probably even kart racer period).
Right now the system is just too hot. When a game like Bomberman R even is shipping 500k, you had to know Mario Kart was going to kill it.







