Despite the similarities, gyros and shawarma are different sandwiches. A gyro is traditionally a Greek dish that is typically served on a pita. Usually made with beef or lamb beef that has been somehow grinded (ground beef) and that's why the texture is different. It also uses less spices than a shawarma does. Shawarma is made of slices of whole meat. Gyros are served with tzatziki sauce and while shawarma is served with garlic or tahini sauce.