The difference between purple potatoes and sweet potatoes is. Purple potatoes eat up especially delicious fluffy and especially face especially delicious but sweet potatoes eat up not so face and feel. Very soft, not too tasty and not so sweet, so are very like to eat purple potatoes, because the nutritional value of purple potatoes is also very high, you see the purple potatoes sold in the supermarket are particularly expensive, more expensive than sweet potatoes out of many kinds of, Gui.