So I recently came across the new lines from both O.P.I and Sinful Colors. I thought I was just picking up two pretty purples, but then I realized Sinful Colors had the same shimmer as O.P.I. Upon closer inspection, I found out it was almost an exact dupe!
They both have that blue and pink shimmer. Unfortunately the shimmer refuses to show in photos, but you can tell that they're almost identical. O.P.I is a teeny tiny bit darker than Sinful Colors. Who would've thought, right?