Just finished listening to all 8 sides of this.
I saw him about 10 days before this was recorded and while some of the songs are the same he changed the arrangements: different tempos, different bits thrown in, order of the solos changed around, all sorts of stuff.
He must have gone back to his room and screwed with the songs, rehearsed the band during the day on the changes and off they went with no sheet music allowed on stage.
This is a good one.