There are differences between a calzone and stromboli. A calzone is a large turnover with fillings inside pizza dough that is sealed and baked. A Stromboli has the ingredients rolled in, like a cinnamon roll or burrito. A calzone typically uses ricotta cheese whilst a stromboli uses mozarella which has less moisture. Calzones never use a tomato sauce inside the dough whilst you can include the tomato sauce in a stromboli.