@Whitigir To me, the "musical" of which I keep saying about the Z1R is literally the "thickness of timbres" and how fluidly the layering and separations are being presented when connected to Solid State devices. My Stax SR009 is not "musical" but is more kind of an "accuracy/references" in tonal timbres thickness. The differences are in the nuances speed, separations and layering.
Ofcourse, pairing with different amps will change this, but most of the time the Z1R musicality or 009 accuracy will remain what it is, and so I deem them being that way. It lead to the same direction where you pair musicality to any Snappy amp, and Accuracy toward any Musical amps (typically Tubes)....unless, you want an overwhelming senses of either one
My 2 cents