Yes agree with LE, it is well known and was discussed on forums just after the release
The STP version is the whole track not edited (apart the fade out of course), while the version on the album is edited, maybe because they thought its was too long, and that these bars don't add much to the outro (it feels like we "wait" too long before the outro solo is really starting)
the strange thing is why they decided to release the "original" non edited version on the comp, and without mention it
maybe it's a "mistake" like twm said ? maybe like the WII mexican single ?
the same for In the gallery which is edited in the outro. maybe we will hear the complete non edited version on a future comp....
as for DP, it's an alternate mix, so with a different vocal take, but all the rest is the same
it's sometimes the case on comps, but it's mentionned (1st example that comes to mind : suite-judy blue eyes on the CSN comp from 91)