MAC Tan is a warm brown with a metallic finish that is permanent in palette and retails for $21.00. In comparison, Too Faced Jingle All the Way Eyeshadow #3 is a warm copper with a frost finish that is limited edition and retails for $16.00.
Too Faced Jingle All the Way Eyeshadow #3 is 85% similar — it is less shimmery, darker.