Here are my swatches from the collection.
I got Rouge Coco #43 Avant-Garde, which I love. It's what I think of as a Penelope Cruz MLBB shade. It's a bit deeper pink-nude. Beautiful! I don't have any comparisons. I also got the three Rouge Coco Shines, #72 Effrontée, #71 Style, and #70 Sourire. I know many people don't like the RCS, but I thought I'd do a few comparisons just in case they'll be helpful.
Empreinte is a nude like Style, but it's a bit lighter and more pink. They actually give two different looks. Style is more of a Calvin Klein-type nude and Empreinte is a bit more of a natural blanked out lip. I didn't swatch Effrontée with anything else, but it's more rosy and less mauve than #54 Boy or #52 Fétiche. Sourire is really, really pretty, even though it doesn't swatch well. It naturally brightens up my lip, but doesn't change the color much. Royallieu is a bit darker, less peach/coral, and more mauve than Sourire (you can see Royallieu oxidizes and pulls a lot more pink on me than it looks in the tube), whereas Candeur is similar tonally, but pales out my lip for a natural mod look.
#48 Évasion is much more opaque than Sourire, darker, and a bit more pink. Évasion looks a lot more pink on me than it does in the tube, since it oxidizes on me like Royallieu.
I'm really happy with all the lippies I bought from this collection. My favorites are Avant-Garde, Style, and Sourire. Style and Sourire are on the sheerer side of RCS. I think all three are unique to the RCS line.