Media noche is the one with the "sweet" egg-bread and it is smaller. The Sandwiche Cubano is made with Cuban bread (always with Lard) and it is usually larger. The filling is the same. Pork, ham, pickles, swiss cheese, mustard and sometimes a little butter/margarine on top to heat it up. Never Never Nunca Mayo. And Never Never Never (yes, 3 nevers) lettuce or tomato.