Urban Decay White Walker is a cool blue with a pearl finish that is limited edition and retails for $19.00. In comparison, Make Up For Ever D200 Crystalline Mauve Turquoise is a cool white with a metallic finish that is discontinued and retails for $21.00.
Make Up For Ever D200 Crystalline Mauve Turquoise is 85% similar — it is more shimmery, brighter.