Different season and they will have different type of potato available in the market. Some of them is hard to find in overseas or other European countries around because some type of potatos only serve for domestic market, no export.
Truffel Kartoffeln quick to be cooked, can just use water to boil it.
Baby Sieglinde small like baby hand, have thin skin and inside is flabby, it is good for mash potato, only available in Autumn
Kipfler (no photo) shape like little banana, with a little sweet taste, is prefect for salad
Linda, german favorite, creamy and solid, can use for many ways - deep fried, pan fried, boiled etc