Raw Blueberries have 1.3 times more energy per unit of mass than Raw Blackberries, which is low in comparison to other foods. Blackberries having low energy density.
Lets compare vitamin content per 100 calories of Blackberries vs Blueberries:
Raw Blackberries have 4.9 times more Vitamin A, 2.1 times more Vitamin B3, 2.9 times more Vitamin C, 2.7 times more Vitamin E, 1.4 times more Vitamin K and 5.5 times more Folate than Raw Blueberries. While Raw Blueberries contain 1.3 times more Vitamin B6 than Raw Blackberries. Both Raw Blackberries and Raw Blueberries have similar amounts of Thiamine and Vitamin B2 per 100 kcal.
Comparing minerals per 100 calories for Blackberries vs Blueberries:
Raw Blackberries have 6.4 times more Calcium, 3.8 times more Copper, 2.9 times more Iron, 4.4 times more Magnesium, 2.5 times more Manganese, 2.4 times more Phosphorus, 2.8 times more Potassium, 5.2 times more Selenium and 4.4 times more Zinc than Raw Blueberries.
Comparison of macro-nutrients per 100 calories:
Raw Blackberries have 2 times more Fat, 2.5 times more Protein, 2.9 times more Fiber, 2.2 times more Omega 3, 2.9 times more Omega 6 and 1.4 times more Water than Raw Blueberries. While Raw Blueberries contain 1.5 times more Sugars than Raw Blackberries. Both Raw Blackberries and Raw Blueberries have similar amounts of Energy and Carbohydrate per 100 kcal.