Cacao powder is made from raw cacao beans, cocoa powder is made with roasted beans.
Cacao powder retains natural nutrients and is bitter and have a rich flavor whereas cocoa powder is less bitter and is less richer.
Cacao is rich in antioxidants, magnesium, iron, and fiber, while cocoa loses its nutrients due to roasting.
Cacao is commonly used in raw, vegan and health-conscious recipes, cocoa is used in mainstream baking and dessert recipes.