I like the new music. And I replayed the first one literally the weekend before this came out, and didn't beat case 5 until the same day I got this game. I'd definitely say Case 5 on the DS has more typos so far. I also feel like the new music is really good. I'm kind of disappointed we didn't get to hear the new investigation - cornered music much for the first trial, but I think the court music in general is a lot better. Also, I actually lost at one point in the first case!
This is actually a ways off, but if GS4 comes out here, I hope some of the characters from case 5 are mentioned in it, along with Edgeworth. I really think it's great how the first PW game makes you go from hating Edgeworth in the early cases to really liking him and even pulling for him a bit in the end, at least if you stop where the original PW game stops. In fact, that's my only worry, that I won't like find von Karma's daughter as interesting of a character as Edgeworth.