Super Mario Galaxy vs. Halo 3 - Which game will sell more units overall?

[omgwtfbbq]

Galaxy will outsell Halo 3. No question on this one. (ok, if the game is generally bad, then it won't. But I think the odds of that are remote.)

I think TheSources original predictions are incredbly generous. I see 10Million for Halo3 (assuming no Halo 4) and 15 million for Galaxy.