This is Revlon "Perplex" and Nicole by OPI "Bah Plum-Bug." I had spotted the NOPI at Marshall's and this was before I'd found Perplex at Ulta. So I thought it might work towards my Jones for Perplex/Paradoxal. Obviously, it is more "blurple" than dusky violet like Perplex/Paradoxal. It also has more of a rosy shimmer versus the violet glow that Perplex has.
One shoddy swatch later (ignore icky cuticles and how I didn't bother cleaning it up, I was lazy that night lol)- Perplex on thumb and Bah Plum Bug on pointer.
The differences are even more obvious on the nail than in the bottle. They really aren't alike at all, but, the idea is similar I suppose. Perplex is opaque in 1 coat, I swear. And I believe it's a creme. BPB is a jelly I think, and it took 2 coats, 3 on my thumb and middle finger I think.
I hesitate to pick a winner of these. Obviously, Perplex is gorgeous. But BPB isn't to be ignored either. I am glad to have both, but to be honest, the BPB's quality does leave something to be desired. It definitely needs a good topcoat (or two) because it is not a hardy polish. Easily scuffed for sure!