ColourPop Very Merry Unbirthday is a warm pink with a pearl finish that is limited edition and retails for $4.50. In comparison, MAC Sunphoria (Feminine Wiles) is a warm lavender with a metallic finish that is limited edition and retails for $20.00.
MAC Sunphoria (Feminine Wiles) is 90% similar — it is more shimmery, darker, warmer.