Chanel Lame Acier (37) is a cool pewter with a metallic finish that is limited edition and retails for $36.00. 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, darker.