I have been messing around with both of these apps lately. I'm trying to figure out which really is the best. As I don't want to keep simular apps to clutter up my screen even more. I have been using both and they seem select different music for you. I put in Tiesto and the same radio on each comes up with different music. It seems Pandora is a bit more accurate on playing artists with simular sounds but I'm not sure how this will be in the long run. Anyway which app do you prefer and why? And any tips on how the "music genome project" works compared to what last.fm uses to play you simular tracks.