MAC Tsk Tsk! is a cool fuchsia with a satin finish that is limited edition and retails for $19.00. In comparison, Too Faced Melted Jelly Donut is a cool fuchsia with a glossy finish that is permanent and retails for $21.00.
Too Faced Melted Jelly Donut is 90% similar — it is darker, brighter, cooler, glossier.