I was gifted my first Chanel polish last Christmas and it is none other than Paradoxal - a grey mauve with purple micro shimmer.
The polish has a nice consistency and applies smoothly. It is opaque and looks good in 2 coats. This swatch is taken indoors with natural light flowing in but not shining directly on the nails. It is a deep, rich looking shade, won't you say? The shimmer that you see in the bottle isn't very obvious on the nails, at least to me. I never really noticed it.
I have read so much about how Barry M Dusky Mauve is a dupe of Chanel Paradoxal. And just because I have the former, I decided to do a comparison swatch to see for myself.
Swatches are 2 coats each. In the sunlight, I can see the difference between the two shades. Paradoxal has much more depth and the purple base colour is much darker than Dusky Mauve. The shimmer in Dusky Mauve is more visible and is what makes the difference in the 2 shades.
In the shade, they look a little more similar.
And sometimes they look the same.
Side by side, they are not the same, but if worn separately, I don't think one can tell the difference.