Ok, finally done with review and swatches. Here is the most important swatch picture I think (Don't want to overtake the thread with a huge picture post, haha) I picked this one vs a non flash one because I think with flash really shows how this Moth Brown does have a sort of purple-y tone to it. At least to my eye it does, what do you all think? My arm is a bit lighter than NC15 at the moment!
I wrote out a description of the other colors, because I know some people haven't seen these, and sometimes people's browsers distort colors
MAC Smoke and Diamonds: A silvery, smokey dark grey warmish taupe
Too Faced Lap Dance: A beautiful lighter taupe greyish/purple, that flashes purple like Moth Brown, but is substantially lighter in shade.
Too Faced Unmentionables: A darker grey shade that leans a little taupe.
Rouge Bunny Rouge Delicate Hummingbird: A medium cool toned purple taupe. Has a silvery frost like Moth Brown
Le Metier De Beaute in Corinthian: A very warm, brown taupe that leans burgundy/purple. Really hard to describe this shade! It's sort of similar to Satin Taupe actually.
The Balm The Mistress: True Gunmetal Grey color. <--- I mainly included this one to show off the purple in Moth Brown
ETA: I must say it is also very similar in color to Chanel Illusoire Illusoire D'Ombre, the shade underneath the layer of silver sparkles.