When distinguishing between stromboli and calzone, the best distinctions I have found are in terms of shape and fillings. Although even then, it sounds like there is no clear-cut quality that sets one apart from the other.u003cbr/u003eu003cbr/u003eThe main difference is their shape. While calzones are more semi-circle, crescent-shaped, like a half moon, stromboli is made in a long cylinder or a log shape.u003cbr/u003eu003cbr/u003eThe other difference is filling and flavor. Stromboli is most frequently filled with Italian cold cuts (think salami, prosciutto, soppressata, and such) and cheese but no sauce. Calzone, on the other hand, has basically anything a pizza might have, including sauce.u003cbr/u003eu003cbr/u003eEven so, there don't seem to be any hard and fast rules about what goes into one or the other, so if you want to go ahead and fill your stromboli with sauce, you go for it!