Heeee, well my vote went for Vertigo, although I really love both songs a lot. And I might say that, although they share the qualities mentioned, I get a very different feeling from both songs.
Elevation, to me, is closer to a love song, or a plead to someone "lift me up out of these blues" and it has some sexiness in it as well
Vertigo to me is more, like Bono said, paranoia, meaning you really want to get out of somewhere and you have this oppressive feeling, which, btw, reminds me of Boy. I, as a teenager, feel more identified with it, I guess that's why I like it the most... and the guitar riff
I really can't explian, well, you know what I mean
I also feel it more religious in a way... although, as we all know, with U2 you can't tell if a song's exclusively about women or God