Giorgio Armani Halo (46) is a warm taupe with a metallic finish that is permanent and retails for $30.00. In comparison, Natasha Denona Glam (321M) is a warm taupe with a sparkle finish that is permanent in palette and retails for $29.00.
Natasha Denona Glam (321M) is 85% similar — it is more shimmery, darker.