MAC Noblesse Oblige is a warm pewter with a glitter finish that is limited edition and retails for $19.50. In comparison, L'Oreal Gilded Envy (755) is a warm pewter with a frost finish that is permanent and retails for $7.99.
L'Oreal Gilded Envy (755) is 90% similar — it is less shimmery, darker.