Sydney Grace Fin is a cool teal with a metallic finish that is discontinued and retails for $5.00. In comparison, Natasha Denona Cloudy Blue (17M) is a cool teal with a metallic finish that is permanent in palette and retails for $29.00.
Natasha Denona Cloudy Blue (17M) is 85% similar — it is more shimmery, darker, warmer.