The one thing I remember for sure is that YDKJ is a straight up creme, and Nirvana is not - it's more of a jelly creme, closer to the jelly side than the creme. I needed three coats for opacity, but I absolutely loved applying it, jellies seem to be a bit easier to work with, less lumpy/bumpy/prone for mess than cremes, so I love a good jelly creme. This is my kind of neutral, a gorgeous mushroom shade!
I actually had it in mind to layer this with another Sinful Colors, Smoking Hot, but I somehow managed to put a huge chunk into my pinkie finger while I was waiting for it to dry. I'll try that out another time and show you, because Smoking Hot is pretty awesome!