Gamespot is Nintendo biased (you can call me stupid or fanboy), it's the truth
they barely care about Nintendo or it's platform, 90% of their site is based on Xbox360/Ps3
so, IGN says 10, Gamespot says 7.5
I say Gamespot sucks, not that IGN is always right or something, but i usually agree with IGN reviews more than Gamespot
don't mind my username, that was more than 10 years ago, I'm a different person now, amazing how people change ^_^