Bottle to Bottle
To me, Perplex has a more dark purple feel while Paradoxal has a more dusty grey feel to it. The shades are close especially in regular lighting but Perplex does look a tad darker. Although both do have a lovely subtle shimmer to them. Of the two, I actually prefer Perplex, I like the deeper purpler. Here's my current Perplex manicure. Application wise, the polish was very smooth and went on easily. Tips are Deborah Lippmann Today was a Fairytale.