Hardware
The hardware for the Wiis in America and Europe are exactly the same. This includes the shape of the system cases and controllers.
Game Releases
Wii titles are usually never released in Europe and America on the same day. For example, "Super Mario Galaxy" was released in America four days before Europe received it. In the case of "Punch-Out!!", Europe received the game first.
Virtual Console
There are some games available on America's virtual console that are not available on Europe's, and vice versa. Additionally, Unoptimized Virtual console games run roughly 17 percent slower than their original speed in Europe. This is because European TVs run at 60 hertz, instead of 50 hertz.
Game Compatibility
Games that are distributed in America will not work on European Wiis, and vice versa.
Special Offers
Europe and America will not receive the same special offers. For example, a black Wii is currently being offered in Europe. As of late 2009, it is unknown whether the black Wii will be offered in America.