Uhh I haven't played it yet, but based on the demo the graphics, difficulty, battle system, and dungeon design is somewhat different. And the VAs are different.
The story and plot progression's probably about the same (though I think there's a prologue chapter). though as I said I haven't had time to play it yet.
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The only certain death in the universe is Mother Hitton's Littul Kittons.
Not changing this line until I beat Seven Heroes (2/24/07)