Both are great bands, but at least U2 have released a few awesome live DVD's, whereas Coldplay have only released the one, and it looks like staying that way:
http://www.ipetitions.com/petition/coldplayingfortorontoDVD/
I saw Popmart back in '98 and wasnt really enthralled by the U2 experience. It was speccy, but sounded shit. I gave them another chance and saw Vertigo, much much better. Agree?