Revlon Luminous Lilac (018) is a warm purple with a luminous finish that is permanent and retails for $9.99. In comparison, MAC Stylist's Tip is a warm purple with a satin finish that is limited edition and retails for $19.00.
MAC Stylist's Tip is 85% similar — it is less shimmery, darker, more pigmented, cooler, less glossy.