I'm going with Radiohead here, just out of personal preference, but I think both bands are extremely overrated (especially Radiohead). Muse have a couple of good songs but they don't keep me interested because most of their songs sound incredibly similar and epic-sounding which isn't really my thing (well not when every song is epic-sounding anyway). Radiohead have some good albums, In Rainbows being my favourite, but I don't really listen to them much, mainly because there are a lot of bands that I think are better than them which I listen to instead.