Marc Jacobs Beauty Topaz Flash is a warm taupe with a glitter finish that is permanent and retails for $28.00. In comparison, Sephora Siren's Charm (111) is a warm taupe with a sparkle finish that is limited edition and retails for $13.00.
Sephora Siren's Charm (111) is 80% similar — it is less shimmery, darker, cooler.