Sleek MakeUP Sunset #10 is a warm copper with a frost finish that is permanent in palette and retails for $9.99. In comparison, Natasha Denona Alchemist is a warm copper with a metallic finish that is permanent in palette and retails for $29.00.
Natasha Denona Alchemist is 90% similar — it is more shimmery, darker, warmer.