ColourPop Revel is a warm brown with a sparkle finish that is permanent in palette and retails for $4.50. In comparison, Natasha Denona Sienna (50DC) is a warm brown with a sparkle finish that is permanent in palette and retails for $29.00.
Natasha Denona Sienna (50DC) is 80% similar — it is more shimmery, lighter, cooler.