Well the main thing is that Etna's voice is different, its a different actor than on the PS2.. she sounds perkier and less evil a lil bit.. but not to bad ig...
Theres an Etna mode, which basically makes Etna the main character or some such like that.
Theres a few other differences as well I believe, but mostly graphical enhancements.
Yeah! Etna's voice is different, I'm so disappointed...I liked her better before. Also the Prinny's have different voices too, I don't like it at all. Why did they do that?