I don't know. Different Stages sounds sort of "hallow" like it was recorded for some FM live airplay. It's great musicianship as usual, but the sound is sort of one dimensional. I'm big on sound.
R.I.R. seems to have a lot more dimension and more variety. The only great thing I think of D.S. is 2112 in it's entirety and Analog Kid. The rest? Just standards it seems. Ok, Natural Science was added.
D.S. has nowhere near the clanky high dimension of Show Of Hands, doesn't have the warm feel of Exit and doesn't have the balls that A.T.W.A.S. has.
As far as the DVD goes...man, I have the Grace Under Pressure tour VHS, Exit Stage Left VHS, Show Of Hands VHS and various boots...it's good for live, but after you've seen so much live footage of them, the documentary, for me, is a major nice break. It was my first time of seeing the group just speaking straightforward. You have to admit, they're not big "interview one on one" guys unless it's Rockline or something like that.