Is Wii U More Powerful Than Wii?

Is Wii U More Powerful Than Wii? Besides the length, which is a noticeable change in the Nintendo’s next-generation game console, the Wii U is much more powerful than its predecessor, plus it’s backward-compatible with Wii games, which is not possible with the Wii. Which Wii game has the best graphics? MadWorld. MadWorld is not