Speaking in very general terms, I have found that tubes often have a "rightness" in the treble that I often, but not always have found lacking in solid state. I would almost call it a "phasey" character that keeps cymbal taps and bells from sounding clear and open. In my experience single ended and class A push pull amps often do not suffer this. Ralph, maybe you could expand on this as your amps seem to excel in this area.
Bruce
Bruce