Sephora Seahorse (115) is a warm plum with a sparkle finish that is limited edition and retails for $13.00. In comparison, Natasha Denona Smoky Plum (23P) is a warm plum with a pearl finish that is permanent in palette and retails for $29.00.
Natasha Denona Smoky Plum (23P) is 90% similar — it is less shimmery.