These are an extremely extremely close dupe for the YSL glossy stains, down to the scent. The one difference I would say is the opacity, the YSL ones are a TOUCH more opaque. They have a unique texture and go on a little watery but also w/ a really strange stickiness, but it sets after about 30 seconds and while you still feel something on the lips, it's not sticky anymore and it wears for about 4-5 hrs on me before it starts to fade.
I picked up Eternal Red and Coral Tattoo and the Eternal Red is a BEAUTIFUL wearable rosy color on my very pigmented lips. The Coral Tattoo is also very pretty & wearable. I've heard the paler more subtle colors aren't so great for pigmented lips and I think that's probably true since these "bright" colors aren't very bright on me at all.
I apply these like I would the YSL glossy stains, putting on 1 light coat, working it in w/ my finger and then applying another coat on top straight from the brush, this will give it a more even coverage.