I know there are variants of stroganoff and goulash that are quite similar - to a point I could not tell one apart from the other. What are the defining properties of each that set them apart as different dishes?
Traditional goulash is a stew/soup, usually using a cheaper cut of meat suited to slow cooking. It usually contains potatoes and other vegetables, as well as noodles.
A true stroganoff consists of paprika-dusted fillet steak quickly pan fried with mushrooms and onions in a sour cream and brandy sauce. It is usually served with rice.
I understand that in the US stroganoff can also refer to a stew made with similar ingredients as the traditional dish, and is served with noodles. This, coupled with the shared use of paprika, is evidently where the line blurs.