Sydney Grace Interstellar is a cool teal with a matte finish that is permanent in palette and retails for $5.25. In comparison, Natasha Denona Smoke (65V) is a warm blue with a satin finish that is permanent in palette and retails for $29.00.
Natasha Denona Smoke (65V) is 85% similar — it is more shimmery, more muted, cooler.