MAC Bon Nuit is a cool purple with a matte finish that is limited edition and retails for $17.00. In comparison, Too Faced Spice of Life (Pumpkin Spice) is a cool purple with a matte finish that is limited edition and retails for $16.00.
Too Faced Spice of Life (Pumpkin Spice) is 95% similar — it is lighter, cooler.