Sydney Grace Starry Night is a warm duochrome with a metallic finish that is permanent and retails for $8.00. In comparison, Natasha Denona Orion (105DC) is a neutral duochrome with a metallic finish that is permanent in palette and retails for $29.00.
Natasha Denona Orion (105DC) is 90% similar — it is more shimmery, cooler.