From what I can tell looking at that picture, Robin's Egg is brighter and lighter, with more white mixed in. It also seems just a touch greener too, (dependent on skin tone and eye color, I'm sure). Then there's that matte texture, which could be anything from dense and buttery to powdery to stiff and dry.
I'm feeling fidgety about it - it's so springy and kooky - like the spunky, Zoey Deschanel turquoise battling against the ultra-tanned Snookie Surf Baby turquoise.
This is one of those colors that some women swear by as their go-to eye color; maybe a little too much, along the lines of those 70's women who always wore baby blue shadow. I get kind of rebellious at the too trendy, porn-iness of turquoise, even though it usually looks so great. It's going to have to be swatched in person, right on my eye for me to get over my iconoclastic feelings here. I want to tell myself that between Odalisque and Surf USA, I have enough turquoise and teal to last me to the age where I'll be too wrinkly to pull off bright colors on my lids. If this one applies really well and doesn't fade, I'm probably going to break down and buy anyways.