Natasha Denona Vintage (49M) is a warm plum with a metallic finish that is discontinued and retails for $29.00. In comparison, Natasha Denona Rosewood (51M) is a warm brown with a metallic finish that is permanent in palette and retails for $29.00.
Natasha Denona Rosewood (51M) is 85% similar — it is less shimmery.