What Are the Differences Between the Wii and Wii U?

There is no console called "Wii2." The successor to the Wii is the Wii U (released 2012). Here is a comparison:

Wii (Released 2006)

• Controller: Wii Remote with motion controls + Nunchuk attachment.
• Graphics: Standard definition (480p); capable visuals for its era.
• Online: WiiConnect24 (basic messaging, updates).
• Storage: SD card slot for saves and downloads.
• Key Games: Super Mario Galaxy, The Legend of Zelda: Twilight Princess, Wii Sports, Mario Kart Wii.

Wii U (Released 2012)

• Controller: Wii U GamePad with 6.2" touchscreen, motion controls, gyroscope; supports off-TV play and asymmetric gameplay.
• Graphics: High definition (up to 1080p); significantly more detailed environments.
• Online: Nintendo Network (eShop, online multiplayer, Miiverse).
• Storage: Internal flash memory (8GB/32GB), SD card, USB external hard drive support.
• Key Games: Super Mario 3D World, Mario Kart 8, Splatoon, The Legend of Zelda: The Wind Waker HD.

Summary

The Wii U was a substantial hardware upgrade with innovative second-screen gameplay. However, it sold poorly compared to the Wii. The Wii remains excellent for family-friendly motion gaming; the Wii U offers a more modern experience with better graphics and the unique GamePad.