Homemade spatzle and gnocchi have noticeably different textures. Store boughten spatzle is harder and drier while homemade is softer and more moist. Store boughten gnocchi is grainier and can't be as soft as homemade without making it soggy. That's my experience. I can't speak to homemade egg noodles.
Supermarket gnocchi may as well go by a different name, if you have it in a proper restaurant or make it at home it's just completely different - and make it at home and you'll realise that you cannot just vacuum seal it and keep it refrigerated for a few months; there really is something quite different going on.
