Musically yeah, they are pretty much exactly the same, much more so than Vertigo vs NS and Xanax vs Fast Cars, but there are some subtle differences that probably change the meaning of the song. It's like what happened with both versions of All Because of You.
There are some different lyrics and no "when the levee breaks" drum breakdown. Plus I think the original lyrics might make more sense with the "you don't know how beautiful you are" bridge. It's another case of them second guessing their gut instinct when it was right the first time. The song is supposed to be a change of pace in the middle of the album so why not go all out and make it a fun song about a sexy girl (I don't think they've ever just done a rock n roll song about a sexy girl ever) instead of throwing in some of the usual geo-politically aware lyrics? We all seem to agree it's not a serious song, but it doesn't have to be. If they kept it Sexy Boots, it could be like the Beatles "I Saw Her Standing There."
Going back to the ABOY comparison, the alternative version of that song fells kind of disjointed where the music during the chorus doesn't match up well with the rest of the song. I think that's what happened with GOYB, but instead of musically, it's lyrically disjointed (verse vs chorus/bridge).
I don't mean to ramble on, but your "uhhhh" response is basically telling me you think I don't know what I'm talking about, I just want you to know I did think about this.