I was at both. I went into Arcade Fire not being a fan. I find their newest album to be the most boring pos to ever be created. However they are very genuine and connect well to the audience. You feel like they bring everyone together. It's a fun moment and reached special during wakeup. However looking back that is the only song i even remember. Radiohead on the otherhand was song after song artistic brilliance. Radiohead by a mile for me.