Good Morning :)
After wearing Mac Pink Nouveau lipstick the other night (you can check it out here) I realised that I owned another lippie which was really similar. That would be Revlon's matte lipstick in Stormy Pink.
Both lipsticks are bright pinks with similar undertones. Stormy Pink is not as vivid in colour as Pink Nouveau and is definitely not as pigmented but you can build up the intensity.
Here is the swatch..
Left - Revlon Stormy Pink, Right - Mac Pink Nouveau
Although they have slightly different finishes - Pink Nouveau is a satin finish and Stormy Pink is matte, they are not worlds apart as satin lipsticks have a semi-matte finish. Stormy Pink definitely deserves an A in duping, what do you think?
I prefer Pink Nouveau as it's a bit more intense and not as drying as the Revlon matte lipsticks but If you want a cheap alternative for Pink Nouveau or maybe are not sure as to whether or not Pink Nouveau is the colour for you I recommend you check out Stormy Pink.