NARS Sultan is a cool purple with a semi-matte finish that is permanent and retails for $19.00. In comparison, Natasha Denona Nina's Orchid (82V) is a warm lavender with a satin finish that is permanent in palette and retails for $29.00.
Natasha Denona Nina's Orchid (82V) is 80% similar — it is less shimmery, darker, more muted.