ColourPop Surf's Up is a cool aqua with a sparkle finish that is limited edition and retails for $4.50. In comparison, Natasha Denona Mint Frost (170SM) is a warm aqua with a metallic finish that is limited edition and retails for $29.00.
Natasha Denona Mint Frost (170SM) is 90% similar — it is more shimmery, darker, warmer.