Lets compare vitamin content per 100 grams of Grapefruit vs Oranges:
Raw Grapefruit has 4.2 times more Vitamin A than Raw Oranges.
While Raw Oranges contain 2.4 times more Vitamin B1, 2 times more Vitamin B2, 1.4 times more Vitamin B6, 3 times more Vitamin B9, 1.5 times more Vitamin C and 1.4 times more Vitamin E than Raw Grapefruit.
Both Raw Grapefruit and Raw Oranges have similar amounts of Vitamin B3 and Vitamin B5 per 100 g.
Both Raw Grapefruit as well as Raw Oranges have insufficient amounts of Vitamin B12, Vitamin D and Vitamin K in 100 g.
Comparing minerals per 100 grams for Grapefruit vs Oranges:
Raw Oranges contain 3.3 times more Calcium, 2.1 times more Manganese, 1.8 times more Phosphorus and 1.3 times more Potassium than Raw Grapefruit.
Both Raw Grapefruit and Raw Oranges have similar amounts of Copper, Iron, Magnesium and Water per 100 g.
Both Raw Grapefruit as well as Raw Oranges have insufficient amounts of Selenium and Zinc in 100 g.
Comparison of macro-nutrients per 100 grams:
Raw Oranges contain 1.5 times more Energy, 1.5 times more Carbohydrate, 1.3 times more Sugars, 2.2 times more Fiber and 1.5 times more Protein than Raw Grapefruit.
Both Raw Grapefruit as well as Raw Oranges have insufficient amounts of Fat, Omega 3, Omega 6, Cholesterol, Glucose and Sucrose in 100 g.