Sephora Lightning is a warm taupe with a metallic finish that is permanent and retails for $10.00. In comparison, Natasha Denona Rhea (118M) (2020) is a warm copper with a metallic finish that is permanent in palette and retails for $29.00.
Natasha Denona Rhea (118M) (2020) is 90% similar — it is more shimmery, cooler.