Natasha Denona Alloy (312DC) is a warm copper with a metallic finish that is permanent in palette and retails for $29.00. In comparison, Terra Moons Martian is a warm duochrome with a metallic finish that is permanent and retails for $8.50.
Terra Moons Martian is 85% similar — it is less shimmery, darker, more muted, cooler.