Pat McGrath Astral Flash Dance is a cool plum with a sparkle finish that is permanent and retails for $30.00. In comparison, Fenty Beauty Gal on the Moon is a warm plum with a metallic finish that is limited edition and retails for $19.00.
Fenty Beauty Gal on the Moon is 85% similar — it is more shimmery, darker, more pigmented, warmer.