ColourPop Whistlin' Pixie is a warm copper with a sparkle finish that is permanent and retails for $9.00. In comparison, Natasha Denona Cyclone (138DC) is a warm copper with a metallic finish that is discontinued and retails for $29.00.
Natasha Denona Cyclone (138DC) is 90% similar — it is less shimmery, lighter, warmer.