I've had both, and I have to be honest, I prefer the Wii for exercise games because the motion control sensitivity on the Kinect (I played EA Sports Active 2) was a bit glitchy, and the heart rate monitor never displayed my heart rate correctly. And controlling the cursor on the screen was a nightmare. The game would periodically pause itself in the middle of a workout or say that the sensor couldn't see me properly.. Don't get me wrong, the Kinect is a great peripheral and I work in a Games store so I handle all of these machines for a living. But I just got the same game on the Wii and it runs like a dream! I missed my Wii. :,)
So which do you guys prefer?