MAC Desert Roadtrip is a warm copper with a frost finish that is limited edition and retails for $21.00. In comparison, NARS L'Amour, Toujours L'Amour #6 is a warm copper with a frost finish that is discontinued and retails for $25.00.
NARS L'Amour, Toujours L'Amour #6 is 95% similar — it is less shimmery.