I really like both games but I'll go for KH2. I simply enjoyed KH2 more than KH1. I like the combos, the master form and Final form were awesome. KH2 for me was a huge improvement from KH1. KH2 was easy that's the only gripe I have for this game.
(KH 1 is a lot harder than KH 2).

I liked KH2 more. It didn't have as good a story, but the gameplay was a lot more fun and a lot of issues such as the cameras were fixed. I loved the drive modes too.

KH2 for me, the story and gameplay was far better than KH1

the only thing i hated about KH2 that it was very easy compared to KH1

i have only play the 2 so iam going with it.

KH2 is just superior in every way. I am a KH fanboy and I adored the first game, but im not so much of a nostalgiafag that im not going to give props to one of the greatest sequels of all time. there is just no comparison. the second game is best, period.

KH1 for me, part 2 was just to easy, i could have beaten the whole game with the x button

Died on the easiest Ansem battle for some odd reason. The one with Donald and Goofy allying you and Ansem attached to that thing... and I fucking died!

Hades Cup is pathetic, Sephiroth is holy shit difficult at level 45, insanely easy at 75. Riku III was easy as hell too.

In fact, Ansem IV was the only thing I died on except Cloud and Leon (though I didn't bother to use items since it wasn't required to win).

Opinion: KH2. Crapload of replay value (even more in Final Mix+ (which I reaaaaly wanna get)), and awesome combat system. KH1 was more difficult and more boring, but I loved the story. It was just so pure and sweet and sad. But unfortunately synthesis and Gummi sucked beyond doubt but I loved the optional bosses (even if Kurt and Phantom were really easy).

I will never be able to tell you because i am simply in love with everything about both games. I died alot agaisnt the bosses too but i loved watching the cut scences over and over again.

Still love watchin the opening to KH1&KH2. At first i could care for the game thought it looked terrible and stupid. Man did my world change when my brother started playing it. Loved everything about the first game! Yes the camera was annoying but i loved the exploring and everything you could do in KH1.

KH2....just out standing ya some phrases were childish but overal this game kicked some ass. Loved EVERY Boss fight!!! All the combos and specials were amazing! Drives....they just OMG made everything so much better on top of it being better!!! I didnt like how you could explore as much and how short towns/levels were compared to KH1.

Loved both stories. I just cant compare the two. Im madly in love with them both!

Kingdom Hearts 1 was just simply amazing and it provided far more of a challenge. Also it's plot was simple and enjoyable to play through. I'm not saying there's anything wrong with KH2 (Except Aerith's voice). My only issue was that it oversimplified the battle system with the ridiculous reaction commands and at the same time made the plot far more complicated than I would think necessary.

KH1 - For gameplay (I mean, the battle system had far more potential, as seen in the Sephiroth battle, 2 system was just to mash on X)

KH2 - For everything else.