For those interested, here's a marked up screen shot of the playlist I created a couple of years ago. It contains all the tracks that showed a difference in playing time. Current iTunes shows most of them as being the same length, which I take to mean that they really are the same version. In an earlier version many of them showed a difference of one second.
Notable differences are A Sort Of Homecoming, Sunday Bloody Sunday, Yahweh, Discothèque and Who's Gonna Ride Your Wild Horses (The Temple Bar Mix). The others are probably the same versions with different amounts of silence at the end I'd guess. I haven't checked them out thoroughly.
This does not include versions that are the same in both releases, yet the wrong versions compared to the physical releases as mentioned elsewhere here in the forum.