Sephora Glitter Dress (357) is a warm brown with a sparkle finish that is permanent and retails for $9.00. In comparison, Natasha Denona Sienna (50M) is a warm brown with a metallic finish that is permanent and retails for $29.00.
Natasha Denona Sienna (50M) is 90% similar — it is more shimmery, darker.