Pat McGrath Flesh 3 is a warm brown with a satin finish that is permanent and retails for $38.00. In comparison, Charlotte Tilbury So 90s (was Birkin Brown) is a warm brown with a matte finish that is permanent and retails for $37.00.
Charlotte Tilbury So 90s (was Birkin Brown) is 85% similar — it is warmer, less glossy.