The only Boswell blend that I have tried is Boswell's Best. It is the same EXACT blend as Tinderbox's Wilshire blend, which I hear is Lane 1Q or something.
Regardless, I know for a fact that Boswell's Best and Wilshire are the same. I have them both and compared them.
So I would say that IMO, they do re-name other blends. I'm not saying that they do it with all of their blends, but they do it with that one.
I'm not saying any of this to deter any business from Boswell's. I'm just letting you guys know what I know. There are a few blends from them that sound interesting and I want to try them eventually.