Chanel Peche Nacree is a warm peach with a pearl finish that is limited edition and retails for $28.00. In comparison, Guerlain La Petite Robe Noire is a warm beige with a metallic finish that is permanent and retails for $26.00.
Guerlain La Petite Robe Noire is 90% similar — it is more shimmery, cooler.