I think they probably took it from the famous "The King and I" Ever seen the movie? Gym class heroes were just playing on the title of that, and that why it sound similar. So both bands were prolly copying that, not each other. Of course, who really cares?
Ohhhh, no you don't!!! :D Nah, I believe they are pretty equal. The Kooks are very Indie Rock, whereas Arctic Monkeys are Rock through and through. I have to say though, in my mind both are nearly as good as Led Zep, Rolling Stones and The Clash. The Kooks do have the BEST bass though. I play bass guitar, and they have inspired me. :)