Initial tests do make me think it at least has potential to be a bit more tubey sounding than the Val2, and more powerful/dynamic. Val2 can either be a bit too solid state and slightly rough sounding (tubes can change this or shift the rough spots around, so could all be tubes I've tried) or not dynamic sounding enough for me.

The analogy to solid state makes sense with Val2 because, although an OTL, schiit is using feedback (like virtually all SS amps) to bring down the output impedance and distortion.  Otherwise, they would have to use a 6as7/6080 variant as a b-tube/cathode follower like everyone else because it is the only other way to do this without OPT's (at least, according to a long article I read that was mostly over my head).  That's why you see that particular power tube family in virtually all other OTL headamps from dark voice, woo, ebay knock-offs and even the Apex Peak. 

This basically brings us round to Bottlehead's non-feedback philosophy and the pros and cons of employing feedback depending on what sorts of distortions are most irritating to a given individual.  https://passlabs.com/articles/audio-distortion-and-feedback