They aren't exactly dupes, just similar in that they have those gorgeous large holographic circle glitter's. Though I do think Bubble's Berries is quite similar in color to Cosmic Forces. Cosmos-tology is more blue than Oceanic Forces which is more green. (See swatches of Cosmic Forces & Oceanic Forces on: The Mercurial Magpie.) There's more glitter in Nire's Desire Polish which I like. They are both stunning, and have definitely taken away my hankering for trying to obtain the Emily De Molly versions. (I'm surely not paying $44 for Cosmic Forces on eBay!)
Bubble Berrie's in the sun:
I used 3 thin coats for each polish. I didn't have to go digging too much for the glitter. Though I did fish out a few of the circle glitter with a toothpick. I also did 2 coats of Seche Vite topcoat, which brought out the sparkle even more.
Cosmos-tology in the sun: