Pretty much every part, wiring and Ebony (front panel and horn) vs. standard finished in the Roma Triode is upgraded in the Roma Triode vs the Roma.
Eh... not feeling that much of an upgrade. It’s kinda silly you need to spend THAT much to be able to use FleaWatts that start getting world class for a few thousand. That’s what one of the best things about Triodes, subjective taste might land you on an amp at any price range. Choosing SET friendly speakers normally can help one save some $, and be able to invest more into TT, phono, room, etc. (unless your favorite SET is ML3)
Spatial, a very modest brand, offers Triode versions in a horizontal way for those that prefer that kind of amp. I think that makes more sense.