Luso and Balthier are both new characters in the PSP version. there are six new classes that characters can become in the PSP version (Dark Knight can now be used by everyone) as well, and... holy crap, i can't remember how many floors there are... dang... a lot, i know that there are a lot and that they are very frustrating...

here's a good one:
how does one ACTUALLY master squire?
hint:it takes more than just JP