User blog comment:Plexioth- xD/Monster Hunter 3 Ultimate/@comment-4132454-20120219193649/@comment-70.54.115.173-20120219194700

From what I know, it's roughly the same thing as the gap between Low Rank and High Rank in Tri. You know how there's the easier enemies in the first half, then the second half has a lot of the same enemies but they're all harder? They also have different equipment and drops.

G-rank in Tri G seems to be even better because not only does it have new equipment and harder monsters like Tri, but all the equipment is redesigned and the monsters have new attacks.