I just made a little video on these two consoles that are able to use netflix streaming.
I think both have good qualities , the wii is easier to navigate through and less cluttered..The Wii remote you dont even have to aim at the tv , just hit the 1 button to stop and start the show. Use the D pad or plus/negative buttons to navigate pretty simple. The only down side to the wii to me is the display on certain shows compared to the xbox you can change the aspect compared to the wii you just get what they show.

Xbox is great too just the remote dying cause of non use. The videos are kinda cramped , but they show way more in the info department. Your able to change the display of the video very useful.