Giorgio Armani Quarzo (2) is a cool taupe with a metallic finish that is limited edition and retails for $34.00. In comparison, Chanel Perle de Lune (916) is a neutral taupe with a metallic finish that is limited edition and retails for $34.00.
Chanel Perle de Lune (916) is 85% similar — it is less shimmery, darker.