Natasha Denona Vintage (49M) (2019) is a warm taupe with a metallic finish that is permanent in palette and retails for $29.00. In comparison, Bobbi Brown Smokey Grey is a warm taupe with a frost finish that is limited edition and retails for $21.00.
Bobbi Brown Smokey Grey is 80% similar — it is less shimmery, darker, warmer.