MAC Billion Dollar Smile is a cool fuchsia with a satin finish that is permanent and retails for $26.00. In comparison, Chanel La Merveilleuse (347) is a warm fuchsia with a matte finish that is limited edition and retails for $45.00.
Chanel La Merveilleuse (347) is 90% similar — it is more shimmery, warmer, less glossy.