YSL Arlene's Nude (121) is a neutral mauve with a satin finish that is limited edition and retails for $38.00. In comparison, Estee Lauder Tenacious (527) is a cool mauve with a cream finish that is permanent and retails for $32.00.
Estee Lauder Tenacious (527) is 80% similar — it is cooler.
