Stellaris Utopia: all megastructures

Utopia, the new expansion for Stellaris, introduces megastructures: Dyson Spheres, Ringworlds, Orbital Habitats, the Science Nexus and the Sentry Array.
People have asked me which of the two new mega-structures that were introduce in the new Stellaris Utopia DLC is better: the Dyson sphere or the ringworld?
A short tutorial video on the mechanics of the new orbital habitat mega-structures and how to build them in the Stellaris Utopia DLC and the 1.5 Banks patch that .
Mega structure time. For a text version; Dyson Sphere .