I doubt it, it has to do with graphical style more then the graphics itself on the Wii. Everything on that console is crisp clear due to the fact everything is basic with big heads.
Here's a screeny to clarify my point:

Looks great for this game and genre.
Then comes Halo, a game on the 360 that's able to run way better graphics at a decent framerate and they come up with just ugly shit. Especially for that retail price and I personally believe the most hyped game should be one that sets us to a new standard in gameplay, graphics and sound and not throws us back ages or should at least make us pay half for this game since you don't get more then that.
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