There are some similarities between the nutritional values between tomatoes and peppers. A big difference is Vitamin C. Both sweet and hot peppers have way more vitamin C than tomatoes.
I am including some of the available information on USDA and Wikipedia. Also, I did some rounding. I am including the items normally listed on the Nutrition Facts Label on food products. The first list is for sweet bell peppers and the second list is for hot chili peppers.
Nutritional Value per 100 g (3.5 oz) of Raw Sweet Peppers
Calories:Â Â Â Â Â Â Â Â 27
Fat:Â Â Â Â Â Â Â Â Â Â Â Â Â 0.1 g
Sodium:         3.0 mg     less than 1%
Carbohydrates:Â Â Â 4.6 g
Sugars:Â Â Â Â Â Â Â Â Â 2.4 g
Dietary Fiber:Â Â Â Â 1.8 g
Protein:Â Â Â Â Â Â Â Â Â 0.9 g
Vitamin C:      142.0 mg   171%  – normally the nutrition facts label includes vitamin D
Calcium:       6.0 mg      1%
Iron:           0.4 mg     3%
Potassium:     213.0 mg     5%
Water         92.0 g
Nutritional Value per 100 g (3.5 oz) of Raw Hot Peppers
Calories:Â Â Â Â Â Â Â Â 40
Fat:Â Â Â Â Â Â Â Â Â Â Â Â Â 0.4 g
Sodium:         9.0 mg     less than 1%
Carbohydrates:Â Â Â 8.8 g
Sugars:Â Â Â Â Â Â Â Â Â 5.3 g
Dietary Fiber:Â Â Â Â 1.5 g
Protein:Â Â Â Â Â Â Â Â Â 1.9 g
Vitamin C:      144.0 mg   173%  – normally the nutrition facts label includes vitamin D
Calcium:       14.0 mg   less than 1%
Iron:           1.0 mg     8%
Potassium:     322.0 mg     7%
Water         88.0 g
Capsaicin       0.0 – 6 g – this gives off the burning sensation when touching the inside of a hot pepper
The percentages above tell you how much a nutrient in a serving of food contributes to a daily diet of 2,000 calories.
