People often get these two cousins of the pizza confused. Some argue that one is personal, one is for sharing. Some argue that one has certain ingredients that the other doesn't... and some people just assume they are different names for the same thing -- which is not the case!
So here's the bottom line:
Stromboli has sauce on the inside. The sauce is almost always marinera.
Calzone has sauce on the side. The sauce is not always marinera.
If there is sauce on the inside, but it's also served with sauce on the side, it's just a Stromboli with a side of sauce.
