"Better" is subjective. For some people, the ambience of BB makes the monte cristo taste better. Who doesn't want to eat inside POTC? But for others, the lower cost at CO makes the sandwich much tastier. We like both, always end up sharing (that sandwich is so filling!), and where we order it depends on our mood and our wallet. As the pp said, both restaurants share a kitchen, so there really isn't going to be a huge difference between the two. By the way, there is also a 3 cheese version which is quite fun, too.