I like the legend of zelda alot more than the new FFs because more Zeldas are released for handhelds, so I am voting LoZ, but gameplay and graphics-wise, new FFs rocks a gamers world. LoZ is essentially a puzzle-action game, and Final Fantasy a action-puzzle game. What do I mean that LoZ's gameplay is not necessarily about the combat, it is about solving quite clever puzzles and such, is great and timeless.
Final Fantasy is a bit more difficult to decipher, because it is essentially a puzzle-game, but since we of course hardly need to think for what we need to use and/or do on the battles, we can define that as action, except on the boss battles, just like LoZ, I've noticed.