BBWW is the most knowledgeable person I know about the tree. RTaylor used to have the story on their website, along with a picture of one they build for Bob.
Yes, it's just one tree, a Honduran mahogany tree. Found in the 60s, and not harvested until the 70s, and it's rare, and the tone from it is like "super" mahogany - lots of fundamentals but sustain and some moderate overtones, but limited. And, of course, like any wood, most of the tone is from the builder.
I have one from Mike Baranik with a cedar top; one commissioned from John Mayes which will have an LS redwood top; and one commissioned from Tim McKnight which will have a spruce top (not settled yet on which spruce).
If you like mahogany tone, and if you like flamey wood, "the tree" is a great choice. But it's rare and getting harder to find.
Cheers,
Phil