Both calzones and Stromboli are pizza derivatives, using different methods to create a sealed, portable pizza but they are NOT the same thing.  There is debate about the exact differences between a Stromboli and calzone, but essentially: Stromboli is rolled up (like a burrito) vs calzones are a folded turnover in a crescent shape (like a taco) Stromboli typically uses only mozzarella cheese due to its low moisture content needed for its structure vs. calzones use a variety of Italian cheeses, including ricotta Stromboli contains sauce, meat and mozzarella and may or may not also be served with sauce vs calzones are usually sauceless, stuffed will meat, cheese and vegetables and served with sauce on the side (many restaurants now serve calzones with sauce inside, adding to the confusion). Stromboli has Italian meats on the inside vs calzones have cheese, meats and/or vegetables on the inside Stromboli are sliced to create multiple servings vs calzones are generally single serving Stromboli originated in America by Italian Americans vs calzones originated in Naples, Italy