Surratt Beauty Patine is a cool taupe with a frost finish that is permanent and retails for $20.00. In comparison, Natasha Denona Deep Slate Gray (32P) is a neutral taupe with a pearl finish that is permanent in palette and retails for $29.00.
Natasha Denona Deep Slate Gray (32P) is 90% similar — it is more shimmery, lighter.