The nutrition of Andean potatoes is generally quite similar to modern potatoes, but there are some differences. Andean potatoes are generally a bit higher in protein. This is probably due mostly to the fact that Andean potatoes are smaller, with a lower ratio of skin to flesh. Much of the protein in a potato is located in and just under the skin.
Andean potatoes can be used just like modern potatoes, but they also come in sizes, shapes, and flavors that suggest different uses. For example, one of my favorite things to do with small diploid potatoes is to roast them whole in the skins.