THIRTY PERCENT!!! More content in the US version. Including a whole extra dungeon(with Boss) with 100 freaking levels!!!!!!!!!!!!:)
...good enough for you...
The Japanese version got good reviews. It was a bit over-hyped/over anticipated, so they bad mouthed it a bit for not being as "intuitive" as claimed. But still has solid and unique gameplay.
I\'m still waiting. As far as I know it still has a 5-29 (EB) due date.