Here my opinion why the wii u is better then the Switch 1 The Wii U is very easy to mod and customise it to your liking and you have a bigger library of games and it wish you a happy birthday! Wii U 4 Ever
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Tru Fact
the switch has a bigger library of games and we have kirby star allies and return to dreamland deluxe.
Basically every WII U exclusive got ported to Switch, and it has portability. However compatibility with Wii and Gamecube is not native, so Wii U is a better experience for these games. IMO Switch 2 has a huge and greater potential, in around 5-10 years. Now its still too soon