Harlow is one of Zoya's Matte Velvet colors. Harlow is a magenta/plum color that is pretty on its own, and with a topcoat. The formula is fantastic. It was opaque in two coats and dried quickly.
Zoya Roxy is a deep plum that is packed with amazing glitter. This polish needs at least two coats, and is smooth with just one coat of your favorite topcoat.
I love the Zoya bottles, and their tiny brushes. I wish they were cheaper though. For me, $8 plus shipping is expensive for one nail polish.