Much has been debated about which is better: Red Potatoes or Brown… or even Yellow or Purple ones? Each are good in their own right, but in the end it comes down to what you want from what you eat.
SKIN: Much of the nutritional value of a potato is found in its skin. Red potatoes are particularly healthy because of the thin, nutrient filled skins, which are loaded with fiber, B vitamins, iron and potassium. Half of the fiber of a potato comes from the skin. On red potatoes in particular, the skin is already super thin, so it doesn’t detract from the taste or texture. 

FIBER: Of the two, Brown Potatoes are richer in fiber and lower in sugar than Red Potatoes

NUTRIENT BREAKDOWN: Both Red and Brown Potatoes are rich in Vitamin C and Niacin. Red potatoes have the phyto-nutrient advantage however, with up to 3 times more antioxidant benefits because of its red skin. Yellow potatoes are an even better bet because they are a  better source of iron and calcium.
CALORIES: The purple potato reigns supreme, with just 200 calories for three small potatoes.