Having gotten under the hood of these amps quite a bit, and built my own guitar amp for the fun of it, I don't think there is anything magic about what brand is put on a hiwatt re-creation. My opinion, the output transformer is the biggest contributer to sound quality--mercury magnetics makes good ones. Outside of that, the circuits are mundane and widely available to be copied, and its parts quality after that. Maybe the name on the box is important, maybe the cosmetics, but I don't see a reason to inquire too deeply into which one is 'official' or legit, or whatever. Dave Reeves, with Harry Joyce using a military style wiring approach, developed some really cool amps. A good clone is going to be the equal of the original, to the best of my experience. The trademark has been through a lot of owners over the years, and apparently can be held by different people in different countries, so I think its only as important as folks feel it is to them. But to the extent it allows one to identify which vendors make a good product, that is very helpful--but my point is its the vendors, not the name, that's important.