NABLA Cosmetics Tenebra is a cool taupe with a matte finish that is permanent in palette and retails for $8.00. In comparison, Glaminatrix Bittersweet is a cool taupe with a semi-matte finish that is permanent and retails for $7.30.
Glaminatrix Bittersweet is 80% similar — it is more shimmery, lighter, warmer.