Sydney Grace Frosted Morning is a neutral taupe with a metallic finish that is permanent and retails for $6.25. In comparison, Natasha Denona Gray-Brown (38M) is a cool taupe with a frost finish that is permanent in palette and retails for $29.00.
Natasha Denona Gray-Brown (38M) is 80% similar — it is less shimmery, lighter, cooler.