It’s a classic tug-of-war between two major cities – but this time it’s not over who has the best sports teams, most things to do or top livability. No. It centres around a hot and spicy classic composed of ketchup, curry powder, cayenne pepper, sugar, cider vinegar, salt and pepper – and can also have Worcestershire sauce and other ingredients. Currywurst. Considered a German classic – the spicy sauce over a pork sausage, usually enjoyed with chips, is served up to 800 million times a year in Germany – 70 million in the capital alone – according to the former Currywurst Museum in Berlin. Its …