Pat McGrath Bronze Nebula is a warm copper with a metallic finish that is limited edition and retails for $25.00. In comparison, Natasha Denona Alloy (312DC) is a warm copper with a metallic finish that is permanent in palette and retails for $29.00.
Natasha Denona Alloy (312DC) is 85% similar — it is more shimmery, lighter, warmer.