Here’s an article from Bloomberg on Subway’s fastest growing competitors in the profitable “sub sandwich” market. Better run sub shop chains can earn around a 30% profit margin, compared to an average 10% margin earned by fast food restaurants as a whole.
Three Sandwich Rivals Trying to Shave a Few Inches Off Subway’s Footlong Empire
O'Dell Restaurant Consulting's Blog 
This is the right blog for anybody who hopes to understand this topic.
You realize so much its almost tough to argue with you (not that I actually will need to…HaHa).
You definitely put a fresh spin on a topic which has been discussed for years.
Great stuff, just great!
I have never heard of Potbelly. Jimmy John sandwiches are all cold (which leaves them flavorless) and they wrap them so tight that it compresses the filling and makes me feel that I am getting only half a sandwich. Firehouse subs are hot and gooey, and the heat enhances the flavor. I don’t like the fakey enthusiasm of walking through the door and having my entrance noted by “WELCOME TO FIREHOUSE SUBS!” Sometimes I just want to be a little more anonymous.