I prefer the sound of Xanax and Wine, but there is a fundamental flaw that U2 must have seen in it because they changed it around:
The chorus is waaay too long. The song really "dies" after the 2nd chorus--they should have ended it there but instead they stuck in a bridge and an extra chorus. When I first heard this song, I played it nonstop, but soon I began getting really bored with the song. Any song that has 14 seconds of verse followed by 50 seconds of chorus, then another 14 seconds of verse followed by 50 seconds of chorus can become overly redundant, which is what happened to me.
Like I said, I love the sound of Xanax and Wine much more than the Mid-Eastern feel of "Fast Cars," and I have to say that I don't like the line "I know these fast cars...will do me no good," but Xanax needed some serious editing to ever make the album.