PSP:
Final Fantasy Tactics
Final Fantasy VII Crisis Core
Final Fantasy
Final Fantasy II
Final Fantasy Dissidia

DS:
Final Fantasy Tactics Advance 2
Final Fantasy Crystal Chronicles:Ring of Fates
Final Fantasy XII Revenant Wings
Final Fantasy III
Final Fantasy IV
Final Fantasy Fables:Chocobo Tales

5 games for the PSP and 6 for the DS.I think that SE wants to keep a balance between the two systems and not favour one over the other.