Hi Foodee,
Moissanite is silicone carbide formed as a single crystal, is is harder than the CZ at 9.25 Mohs compared to the 8.75 Mohs of the latest CZ's, I really don't consider the Moissanite as a diamond simulant but as a created gem of its own beauty but never will compare with the diamond as the new CZ's.
The Moissanite is bi-refractive so when you see with a loupe you can see double facet intersections, the stones has inclusions calle "micropipes" that are kind of fibrous material inside the stone and the color is in the tints of green, brown or yellow but never as white as a diamond or a CZ, I think that any CZ even the generic ones are better diamond simulants than the Moissanite at a much lower price.