They are all considered Genetic Hackle fowl as long as the feathers meet the basic criteria for fly tying, including stiff barbs, feather length, and the way it handles being bent.
The lines have been crossed by former breeders so that's fine. As for whether they are genetically distinct enough to enhance vigor I don't know.
Whiting snatched up the most famous lines to advance his program and none of that blood will ever be available.
My impression from the FB group is there are a few different lines left in the hands of private breeders, of these, I still think the Alsdorf line from Dennis looks the best.

But I may be biased since that's where my birds come from.
I let mine free range all day and they do great. Predator savvy good roosters. The feathers stay in really great condition with room to move and the cleanliness of the open space. The roos raised together don't fight.
I honestly just
can't understand why people keep them locked up in horrible tiny cages.