Toughest question in the alternative rock genre. They are both awesome but I would have to say Coldplay wins by a little bit, I just love The Scientist, Yellow, Lost, Viva La Vida, Violet Hill. Oasis is close behind with Wonderwall, Don’t Look Back in Anger, Live Forever, etc.

Or if you don’t like any of those what’s your favorite alternative band?
Radiohead, Stereophonics, etc
why did i ask this twice?