Charlotte Tilbury So 90s (was Birkin Brown) is a warm brown with a matte finish that is permanent and retails for $37.00. In comparison, ColourPop Frick 'n' Frack is a warm plum with a satin finish that is permanent and retails for $7.00.
ColourPop Frick 'n' Frack is 80% similar — it is lighter, cooler, glossier.