NYX Biker Babe is a warm burgundy with a metallic finish that is permanent and retails for $7.50. In comparison, Sephora Smoky Quartz (111) is a cool brown with a metallic finish that is permanent and retails for $14.00.
Sephora Smoky Quartz (111) is 80% similar — it is more shimmery, lighter, warmer.