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. Kumquat vs Quince Nutrition will help you choose the best fruit among the two. Carbs in Kumquat and Quince are 15.90 g and 15.30 g respectively. The protein content of Kumquat and Quince is 1.88 g and 0.40 g. Protein to carb ratio of any fruit must be approximately 1.34. Protein to carb ratio of Kumquat is 0.12 and in Quince, it is 0.03. Nutritional value of fruits is incomparable to other food items. They provide all the vital nutrients required for proper functioning of our body.