I haven't been following amps very much over the last year or two and this is the first I've even heard of a W800. A few videos I just listened to sound great. Actually the best tones I've heard from a Wizard IMO (UberschallEL34's video). As far as what this amp is... the other Wizard models' schematics/origins are widely known and my understanding is that they aren't considered novel by many.
Looking at the photos of this amp, it certainly appears to be an 800-based topology. That said, I'd love to try one out given the opportunity.
Build quality is another story. I personally would do things a little different but hey, I'm not the one selling $5K amps