MAC Triennial Wave is a cool blue with a semi-matte finish that is permanent and retails for $17.00. In comparison, Natasha Denona Koh Tao (89V) is a cool blue with a matte finish that is permanent in palette and retails for $29.00.
Natasha Denona Koh Tao (89V) is 85% similar — it is less shimmery, lighter.