You have no issue comparing the Move to Wii, its also different hardware. It uses a camera to track in 3D space.
Kinect is a camera, so is Eyetoy. Thus aesthetic reasons are the same. But no... right?
The camera is there only to make Move more accurate, Wii has the sensor bar for that. Overall it is extremely similar. Even button placement and shapes are very similar...
Kinect is not just a camera. Even basic things like how the sensor bar actually tilts to view different portions of a room make a huge difference, let alone an obviously much larger focus on voice tech and even just colors the person is wearing or showing to the device.
Put it this way. Wii MotionPlus games are coming to the PlayStation 3 now, but not Kinect. PlayStation Eye games can come to Kinect, but because of how different the hardware is the games would play completely different, requiring completely different design.
It is just not the same thing.