Floyd, though I do listen to opera, like you I listen to more instrumentation than vocals. Mussorgsky, Mahler, etc. I was at Bernard Haitink's Mahler 1 last Sunday, watching him do Beethoven ninth this Sunday, also going to another Beethoven's seventh Monday and Sibelius' violin concerto the Sunday after that.
Adyc here, another GG owner listens exclusively to classical, so does the UK distributor. Audiophile Bill who demoed my dac is a classical guy and was also a first trombonist in a small orchestra
If you simply said your analog gear was better, I would understand. But the fact that you are saying it is mushy, etc, makes me think something is wrong with the dac you have been sent or the setup. Suggest you get another B7 owner to visit you to check if dac is sounding as it should be, else you are having a wrong audition for some reason
Also try a different power cable as there might be some mismatch. Play music through both spdif and usb to check if both are giving similar output. Also hope you are not running SE into balanced, that might give issues.