Hey again, I found those two cacti in a shop: Probably "Echinopsis" but which variety. The first looks like an "Echinopsis Lageniformis" I am not sure about the second.
I have done some more research and it looks more like Gymnocalycium type. Maybe a variety of Gymnocalycium Oenanthemum. However, I cannot find a picture of one that looks exactly the same. Thank you for your help anyway!