The main differences between Devil's Food Cake and German Chocolate Cake is the type of chocolate that is used in the cake batter. Devil's Food Cake is made with a type of dark, unsweetened chocolate called "baking chocolate," which gives the cake its deep chocolate flavor. German Chocolate Cake, on the other hand, is made with sweet baking chocolate, which is a type of chocolate that is sweetened with sugar and has a milder chocolate flavor.