Lethal Cosmetics Descent is a cool lavender with a metallic finish that is permanent and retails for $6.00. In comparison, ColourPop Nouveau (Fade Into Hue) is a cool purple with a frost finish that is limited edition and retails for $4.50.
ColourPop Nouveau (Fade Into Hue) is 80% similar — it is more shimmery, darker, more muted, warmer.