Zelda, obviously. It's not even close for me.
Zelda games are better and more consistent in my opinion.
Also, because of the original (Saving. Also, it basically paved the way for RPGs like Final Fantasy) and Ocarina of time (overall transition to 3d world, locking/Z targeting, context sensitive controls) I think Zelda has been more influential in gaming as a whole.
They might be hard to compare because of different genres. But Zelda is also undoubtly the greatest franchise in it's respective genre. Action adventure or whatever you want to call. Fact is, similar games are often just described as 'like Zelda' or something. You could definately make the argument that FF is the greatest JRPG franchise but it wouldn't be as clear cut (I prefer Chrono for example)
Spending warm summer days indoors
Writing frightening verse
To a buck-toothed girl in Luxembourg
NES, SNES, N64, GC, Wii, WiiU, GB, GBC, GBA, DS, 3DS, Mega Drive, Game Gear, PS1, PS2, PSP, XBOX 360, Atari Lynx








