I would add, IMO, that we have resolving, so that can mean for example 'detail' or 'transparency'. I would add 'timbre' to that. This is texture, tone AND resolution. The small cues in the music that add up to something bigger, and make the whole illusion much more believable. That is where SETs can leave the rest of amplifier topology behind to my ears. As in all things, no amplifier or matching speaker is perfect. But the important parts of the illusion or music image, in a SET has it nailed to me, it convinces me much more often than solid state.