I wanted to test these on light and darker colors. The orange is Sephora by OPI How Cute is That and the green is Revlon Scented polish in Ocean Breeze. The pointer finger is without any top coat, the middle finger has the Essie matte top coat and the ring finger has the Hard Candy.
Overall, there is not much of a difference.. Though I will say a few times the Hard Candy has left a milky film on my polish. I've never had any problems with the Essie matteifier.
Sorry I messed up the green with the Hard Candy getting impatient moving some nail polish into my new storage system. :(