Falcom has worked extensively with PSP and explained to the magazine they had to downgrade the sampling rate for audio due to hardware limitations. This is no longer a problem with PlayStation Vita. They also plan on improving background effects and the overall look of the game from start to finish.
Ys Celceta: Sea of Trees will have a camera that’s more dynamic than the on in Ys Seven. Falcom president Toshihiro Kondo explained to Siliconera in an interview Ys Celceta: Sea of Trees will use a battle system similar to Ys Seven where players can change characters in battle. Keep an eye out for our interview with Falcom about PlayStation Vita development and maybe even some Trails in the Sky discussion soon.