It's hard for those willing to achieve high levels and beating the crap out of every monster...The more levels you gain, the hardest the game gets. You must develop your characters really well, without wasting too much JPs and only learning useful skills...And I still haven't beaten it.

FFTA wasn't very easy by itself, but it's definitely easier than FFT. It's a rounded down FFT, I'd say. My opinion: GO FOR BOTH!