The Wii U browser is spectacular and its web interface, in my opinion, is second to none. The
Nintendo just has a really good layout and you can go into settings and set it to mimic different operating systems. The touch screen is just gravy.
The Xbox One version is getting better, though. Just needs a few tweaks. It gets points for playing video better than Nintendo's slowly aging hardware and not crashing as much. With the new (?) ability to download stuff from the web and the new controls/look, it might be the one to beat.
It's why I want a Switch browser so badly. With a power update, it could be the best yet.