First off - don't point out that FFXIII will sell a lot more worldwide, I am aware of this. Japan only.
The comparison I believe is an apt one - FFXIII is released for a higher price, MH3 is pay to play
FFXIII will be bundled with the 250 gb PS3 slim. MH3 had a few bundles with the Black Wii, classic controller etc.
FFXIII is predicted to sell 1.5 million by Famitsu
Monster hunter has currently sold 0.89 million, almost 12 000 of which was last week. It should be boosted by the Wii price cut and holidays.
My prediction = no, but it will be VERY close