wii motion plus controller vs wii U motion plus controller

Whats the difference between wii motion plus wiimote and the wiiU wii motion plus controller. I see both on amazon but the wiimotion plus controller is 10 bucks cheaper.

thanks

Links: http://www.amazon.com/Wii-Remote-Plus-Black-Nintendo/dp/B0045FCKVI/ref=sr_1_1?s=videogames&ie=UTF8&qid=1356721143&sr=1-1&keywords=wiimote+plus

http://www.amazon.com/s/ref=nb_sb_noss_1?url=search-alias%3Dvideogames&field-keywords=wii+u+remote&rh=n%3A468642%2Ck%3Awii+u+remote