Here are the polishes after 1 coat, these do not have a base coat underneath. The CQ is most sheer/streaky, followed by the OPI. To my complete surprise the Essie was the most opaque and least streaky.
Here are the polishes after 2 coats. The picture is slightly blurry but again the Essie looks the best to me.
Here are the polishes after three coats. I was not at all impressed with the CQ, which is probably why I've been using it for frankens. The OPI is managable, I'm sure with a ridgefilling base coat and more patients it would look great. The Essie won this for me, it was not at all streaky and had great coverage in three coats.