Forgive me for laughing at the codes thing, but codes make me RAAAAGE.

Anyway, yes he was slightly more difficult in KH1 than KH2, though it has alot to do with the fact that your in a smaller space and KH1 Sora has far less mobility options than his 15 year old omg-1-year-up-gives-me-Jedi-Master-Skills self, which is why you'll find Sephiroth harder.