A comparison of the same place:
Notice the wall in MkWii? It goes straight all the way down. That doesn't look promising.
EDIT: According to this: http://www.youtube.com/watch?v=BC6oeMOZUaM It does so in MKDD too.
Anyway, stop the video at 20 sec, look. It looks smoother and softer in the Wii version. And it has dumps in the way. That might be to make people not only go on the far right side...
Edit number 2:
YAY! They are making the question boxes a lot bigger
http://www.vgchartz.com/games/userreviewdisp.php?id=261
That is VGChartz LONGEST review. And it's NOT Cute Kitten DS