Well I've seen both live in the last 2 weeks and have listened to both albums over and over so I think I'm fairly well placed to judge! I'd say DBTT is marginally better as it has more stand out songs - for all I love X&Y as a whole I'd only say Fix You is a brilliant single whereas DBTT has quite a few - Turn up the sun, Lyla, Importance of being idle, Guess god thinks I'm Abel, Keep the dream alive and A bell will ring. I also thought Oasis were the better live act aswell, as perfect musically as Coldplay were at Bolton.