I know this post is a little late (ok ok very late, I have been meaning to publish it for over a year now!) but how and ever, better late than never...
For anyone who doesn't know, OCC (Obsessive Compulsive Cosmetics) are a cruelty-free all-vegan cosmetics store who make a bunch of different cosmetic products and tools - but their pièce de résistance are their Lip Tars. Ostensibly a pro product, these are great for anyone who likes to play with makeup.
Sleek Makeup (a drugstore/budget makeup brand that I absolute love) have released (oh, back in 2011 I believe) their version - called Pout Paints.
Here follows my compare-and-contrast.