Even if there were good reason (which price differential is not), even John Turnbull has stated that it is the same exact plant, save the teeth, and the hairs. I wouldn't mind having them as subspecies of each other. Then no one would use a hamata photo for a tentac, etc. Either way, no one would do that. They would just keep a price differential on hamata and claim it as the "toothed variety" or something. Raff is all the same spp, but people will pay tons of money for special forms.
I don't know why hamata is so expensive anyway. It's nice, but it ain't that nice. Also, there are multiple clones from at least 3 locations in TC, and some seed grown ones. Not like it's rare in situ.....