MAC Polished Jet is a neutral gray with a frost finish that is limited edition and retails for $21.00. In comparison, NARS L'Amour, Toujours L'Amour #8 is a warm gray with a metallic finish that is discontinued and retails for $25.00.
NARS L'Amour, Toujours L'Amour #8 is 80% similar — it is more shimmery, lighter.
