generealy on switch but for me on wii u because my parents have activated the parent control feature so i have screen time on switch but not on wii u>:]

The Switch release is a tiny bit better graphically and runs a little better. Besides that, the two are exactly the same so it's all down to preference. However you will need a modded Wii U to download the dlc unless ypu had downloaded it previously.

also the switch version has more sounds so the experience is more emersive

hands down wii u

Switch version runs a little better and has slightly better graphics

if you say technically speaking, switch. aside from that theres barely any difference. I personally like to boot the game on wii u more because of the splash screen and the logo.. and ofcourse because i can get all the dlc for free. (dont tell the ninjas)