The difference is that those people are wrong.
Squall isn't constantly telling people they're going to kiss the moons and getting himself into all kinds of trouble because he's stupid and doesn't know it's a bad idea to rush straight into danger.
So yeah, Rinoa would be a better comparison for Kid than Squall.
Of course, Rinoa also has a certain amount of charm and cuteness that makes her more bearable than Kid.
What kinds of trouble does Kid even get into? She pretty much spends all the time she's with you bailing you out, with the exception of the time she gets poisoned by Lynx.
Also, I will tolerate no Harle besmirching, top tier character right there.
--
Twostuck, Homestuck RPG: http://www.gamefaqs.com/boards/8-gamefaqs-contests/62168402