Bobbi Brown Black Pearl is a warm taupe with a metallic finish that is limited edition and retails for $38.00. In comparison, Natasha Denona Glam (329M) is a warm taupe with a metallic finish that is permanent in palette and retails for $29.00.
Natasha Denona Glam (329M) is 90% similar — it is more shimmery, lighter, cooler.