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