I listened to the first side of the LP for several hours, going back and forth between the Sky30 and the HM7. While I did notice some differences, a lot of it was nuanced and slight (as opposed significant) differences. It was also subject to a few minutes of downtime to switch SUTs. This was not a DBT.
On the Sky30, the soundstage was wide and deep. The image and location were nicely rendered. In my setup, the image was very slightly forward of the speakers but well placed. Air around the voice and instruments was excellent . I could easily locate Geddy's voice and bass, Alex's guitar and Neil's various drums and cymbals in the 3D space. As expected, Geddy's voice had a nice edge and crispness to it but there seemed to be a touch more of sibilance. The bass and guitar had a lot of good detail and harmonic structure to their sound. The bass and guitar were easily separable in their duets. The bass was very full and deep. The percussion was well defined.
On the HM7, the soundstage was wide and deep similar to the Sky30, perhaps a bit wider. The image and location were nicely rendered as before. The image was neutral or slightly laid back of the speakers with the HM7. Air around the voice and instruments was excellent as before. I could locate the voice and all the instruments as before, but I could locate them a bit better in space, especially when localizing the drums circling across the soundstage. Interestingly, in comparison, now the Sky30 seemed a bit etched as if it had a slight bit more of HF energy than the HM7 (there was a little less sibilance with the HM7). The detail in the instruments was there and the HM7 had great sonic texture and separation of the bass and guitar in their duets. The HM7 had a slightly more rounded heavier bass but not boomy.
In sum, both sounded great - especially the soundstage, dynamics, liveliness, and musicality - and both had a very realistic presentation. There was an ease to the sound from both SUTs but the HM7 seemed a slight bit more realistic and smooth without being lush or colored. Perhaps because the HM7 did not have that slight edginess that the Sky30 had. Some caveats though - (1) I have used the HM7 longer than the Sky30 so it may be that I am more familiar with, and thus subconsciously prefer, the sonic signature of the HM7, (2) my system tends to be more on the neutral but revealing side, so the Sky30 may be too much of a good thing, and (3) in matching levels as best as possible, the Sky30 had a 0.22dB gain advantage.
(Next, some Jazz or Classical).