Tom Ford Beauty Spice is a warm brown with a metallic finish that is permanent and retails for $45.00. In comparison, Charlotte Tilbury Oyster Pearl (was Marie Antoinette) is a warm gold with a metallic finish that is permanent and retails for $34.00.
Charlotte Tilbury Oyster Pearl (was Marie Antoinette) is 85% similar — it is more shimmery, lighter, cooler.