Warthur
Grace Under Pressure is one of the better albums from Rush's synthesiser-oriented period, which was a stylistic departure which wasn't to everyone's tastes. To date, the main official live release from this era was A Show of Hands, which naturally focused on songs new to the era rather with only Closer To the Heart pre-dating it - as a result, it didn't really reflect their actual setlists of the time.
This live document of the Grace Under Pressure tour redresses the balance by offering something a bit closer to actual concert setlists of the time (though it's a bit truncated at just over an hour long, rather than presenting a full-length show). With more guitar-heavy songs in the mix, this results in a more varied sound than the studio album, though there's still a strong focus on recent-ish songs - the only pre-Permanent Waves tune played in full is Closer To the Heart, and there's a few more fragments present as components of the two medleys which bracket Vital Signs towards the end, and that's it.
Still, the sound here is rockier than that presented on A Show of Hands - the material on that was recorded in 1986-1988, when Rush had gone even deeper into synth territory and had heavily layered their studio compositions to the point where to reproduce them onstage they had to resort to a certain amount of preprogrammed synth parts, curtailing the scope to deviate from the studio renditions of songs and lending a somewhat cold and overly-polished air to proceedings. In contrast, it's apparent here that in 1984 the band were still a bit looser and more organic onstage, which is generally helpful, and so it's quite handy for giving a broader picture of what Rush were doing live in this period.
It's not perfect; the overall sound a bit muffled to me, and the audience is overly present in the mix. At the same time, that very lack of perfection makes this the ideal counterpoint to the overly precise Show of Hands.