I haven’t personally seen a moissanite with greater fire and brilliance than a really well cut diamond, although what you said about the cut probably applies here since moissanite has a higher refractive index. Where would you shop for high quality moissanite? So many of the places that sell them seem to focus on being cheap unfortunately.
CZ also has the problem of being softer and more subject to environmental forces, as gems CZ ages much faster.
CZ also has the problem of being softer and more subject to environmental forces, as gems CZ ages much faster.