NARS L'Amour, Toujours L'Amour #4 is a cool gray with a matte finish that is discontinued and retails for $25.00. In comparison, LORAC Shadow (Mega Pro 4) is a cool gray with a matte finish that is limited edition and retails for $19.00.
LORAC Shadow (Mega Pro 4) is 95% similar — it is warmer.