It depends on your preference. For those who prefer a more white sparkle effect (like a diamond), a Hearts & Arrows Cut would be best as it minimizes the double refraction and has a less splintery effect compared to a standard Brilliant Cut. There are typically 8 distinct arrows and hearts in the pattern. If you want to maximize a moissanite's fire and brillance, a Brilliant Cut is preferable. This cut has been described as having a discoball effect by some and is also splintery with its thin facets. See this video for a great comparison between the two cuts. An Old European Cut (OEC) is also a great choice if you prefer chunky facets with lots of soft pastel colors. Here is a comparison video between August Vintage's Hearts & Arrows Round and Old European Cut Round in different lightings.