Nutrients are present in all the fruits but in different quantities. Hence, it is essential to be aware of the nutritional value of fruits before we add them to our health routine. White Grapefruit vs Passionfruit Nutrition will help you choose the best fruit among the two. Carbs in White Grapefruit and Passionfruit are 8.41 g and 23.40 g respectively. The protein content of White Grapefruit and Passionfruit is 0.69 g and 2.20 g. Protein to carb ratio of any fruit must be approximately 1.34. Protein to carb ratio of White Grapefruit is 0.08 and in Passionfruit, it is 0.09. Nutritional value of fruits is incomparable to other food items. They provide all the vital nutrients required for proper functioning of our body.