ColourPop Serendipity is a cool taupe with a semi-matte finish that is limited edition and retails for $4.50. In comparison, Marc Jacobs Beauty Moment-o (590) is a cool taupe with a matte finish that is limited edition and retails for $29.00.
Marc Jacobs Beauty Moment-o (590) is 80% similar — it is less shimmery, darker, warmer.