The recipe I'm about to use calls for marinara sauce. I have my fave spaghetti sauce. My question is: Is there really a huge difference between marinara sauce and spaghetti sauce? The spaghetti sauce I use isn't a meat sauce, it has mushrooms, onions and garlic in it. I've searched it online and the main answer I'm finding it marinara sauce is meatless and a little bit "runnier"