You May Pick��� One Of These Sausages, They Are Served On A Hoagie Bun With Weinkraut, Chips, German Style Potato Salad And A Sweet Mustard. The Difference Between Sausages Is...bratwurst Is Pork, A Knackwurst Is Beef And Pork, And A German Sausage Is All Beef. They Are Mild In Flavor And We Get Them From An Authentic German Family Who Have Been Making Sausages For 3 Generations.