I bought black ops 2 for wii u though after already playing it on 360 and it was massively inferior. Much worse frame rates, missing detail, slower load times and a less ideal controller to play it.
http://www.eurogamer.net/articles/digitalfoundry-black-ops-2-wii-u-face-off
It was games like this that really gave away just how poor the wii u spec was not even able to match consoles released 5-6 years before. At the time Nintendo fans were blaming lack of development experience and a cheap and nasty port as the explanation but now when you realise the wii u only has a 176 gflops gpu and 3 very weak 32bit PPC cores at 1.2ghz what they achieved seems pretty fantastic considering the game had fairly high cpu requirements.
Really it was only the motion controls on both wii and wii u that added something to the gamplay of their games.
