The Radiance are almost certainly NOT Bentley headphones. At least in the long-term.
A long-term affiliation with a carmaker does not makes sense for Focal... But a run of limited-edition co-branded headphones as a way to introduce a new model does.
I'm betting the mass-production Radiance will not feature Bentley branding, and probably feature different colors... Some other metal finish in place of the gold, most likely. I think the design elements and architecture of the headphone is all mass-production though... Including that cool "swirling grid" pattern on the cups.
I believe the Radiance will be a permanent member of the Focal family... It's priced less than the Clear, but more than the Elear, so make of that what you will. Although I suppose a production model might be priced directly alongside the Elear, since LEs are always up-priced anyway.