I don't get peoples huge descrepancies in the two systems.
The games are essentially identical, save loading times, some extra nature sounds and slight graphical difference.
To me those things shoudl not call for a 4 point difference. Heck, I don't think they should account to a difference at all. If there is some fps hickups and other technical things that make the game not run as smoothly or something, then yes som dock. But I hate the huge dock for something grahpical that unless your playing side by side with the other version no one would notice.
It's especially for the FPS hiccups. They are very noticeable in the Wii U version by times. And resolution could affect the score too. All little details that enhances the experience piles up and ultimately points are taken off.