This song is an interesting case study into the question of 'why do I like this version of the song more than any other'. I have a half-baked theory that for me, I mostly just like the first version of any great song I hear, regardless of whether or not it is the original or 'best' version. But this track is so different to the Rolling Stones's version that I think it would probably divide people pretty clearly. Produced by Lee Hazlewood/Billy Strange, 'as tears go by' is here recast as a crisp pop bossa nova. They even change the chords slightly (adding a new chord as she sings 'by'). To me, this makes the song vastly superior to the original (or any other I've heard). But I'm not sure anyone has ever agreed with me yet on that one...