I pick Final Fantasy Tactics and I have played both games.
FFTA more than lived up to my expectations though and I would not have liked it to be anything like FFT.

FFT:A had a more simple storyline, easier battles, etc. Basically there was less of pretty much everything, but that was in my opinion only good.
It was a game for Gameboy Advance, and hence not a game I would sit and play for hours at home. Instead I'd play it on the bus, when being bored when I was in town, etc. It simply wouldn't have worked if it had been as complex as FFT. It would have defeated the purpose of FFTA being a gameboy game.