First up, the Barry M. In the bottle, it looks very much like the Chanel.
On the nail (two coats for each), they continue to look very much alike. Very, very much alike, in a variety of lighting conditions. Bravo, Barry M!
Next up, the Revlon. In the bottle, it looks pretty close, but not quite as close as the Barry M did.
On the nail (again two coats for each), it's same story as the bottles: close, but not quite. Bright light brings them closest to each other in appearance.
The Revlon definitely leans more purple than the Chanel, and that's a fine thing as far as I'm concerned.
And finally, not at all a dupe but a polish I picked up because the brown and purple shimmer combination it had going on reminded me a bit of Paradoxal. CQ is a brand made by Scherer, the company that also makes Petites, Petites Color Fever, and Chameleon polishes. This particular shade is called Shimmering Bark; it's much warmer than Paradoxal but seems distantly related somehow.
Since I already had Paradoxal on two fingers, I went ahead and did a comparison even though I knew from the bottles that these were not close.
One big difference between Shimmering Bark and Paradoxal is Shimmering Bark is much more sheer; I used four coats of it versus two for Paradoxal. Hello, layering polish.