The only similarities that FFX and FFXIII have is the linearity, and thats it.And even then, FFX had blitzball, which eased the linearity by alot(even though i was not a fan of the minigame).FFX has an excellent gameplay, probably the best in the series, while XIII was almost all automatic.13 story was awful, while on X was excellent(againd for me the best in the series, or the very least as good as VI).Characters are also better in X.All in all, X is a better game than XIII because is a better game, period.Its not just because that they are both linear that they are similar.Probably if 13 was in PS2 era it would get even more hate than it gets, because the only thing going for it(graphics) wouldnt probably be as good as in the PS3(relatively to its time)

XII, easily. It's not even close. X had a pretty good premise, but that was ruined by being a very linear game and some of the worst characters in the series. Characters with the emotional maturity and awkwardness of a 10 year old girl (laughing scene, I'm looking at you).

XII brought back a fully explorable world and had a much more "serious" cast of characters, with much less anime-isms. And the music was definitely on another level compared to X. And I love the combat.  Felt like a Baldurs Gate or Knights of the old Republic kind of system, but more customizable.

FFX, along with FFVIII and FFXIII is on the bottom of the pile when it comes to the series for me. And I was on board since the original on the NES. FFXII was such a breath of fresh air compared to the two lackluster titles it's sandwiched between.

X, no question. I absolutely despise the combat in XII.

FFX easily for me....I felt.....free in 10 and liked the characters, story and combat WAY more in X than in XII.

I found X to be a more personal, character-centric story (especially the ending).

The story for XII, on the other hand, was majestic in its scope. While it minimized the significance of the characters, it really was a brilliant tale.

Thank you good sir, I was far too lazy to look them up. 

I'll admit I like the Star Wars-yness too. Then again, 12 is like my second favorite FF. 10 and 12 are like my kids. I can't truly pick one over the other. They're the best in the series (pour moi)

I don't like either of them that much, but I guess FF10 wins this thanks to its battle system. It's pretty good!

Overall it's FFX for me.

The characters, battle system, world and story all gelled with me and were very impressive for the time. The side-quests and Blitzball were superior to those found in XII which I found to be repetitive. It was also heavily story focussed (and linear) but balanced it with interesting side-quests and late-game content.

I fully acknowledge however that XII's story, setting and characters generally had more depth to them. Vaan and Penelo felt irritatingly out of place the further I played however, and essentially stopped me from caring about the storyline. I liked the fact it was open world but the content within the game was too repetitive. Without the story and characters to keep me going I eventually got bored of the game, and just didn't bother with the late/post-game material.

FF XII is possibly my favorite game of all time, honestly.

but its no surprise X is winning by a landslide.