Sephora Cinnamon (373) is a warm copper with a metallic finish that is permanent and retails for $9.00. In comparison, Natasha Denona Crest (267M) is a warm copper with a metallic finish that is limited edition and retails for $29.00.
Natasha Denona Crest (267M) is 90% similar — it is more shimmery, lighter, warmer.
