2. "RE: A question on Dyson Spheres & UF"
In response to message #0
The only reason to expect them to be the same is if the Jenolan sphere is also designed to have habitable environment on the interior. For that to be the case, the radius of the sphere has to extend into the Continuous Habitable Zone of a star similar to Zeta Cygni.
A sphere designed purely for collecting solar power could be made smaller than that.