I grew up in the Southeast, lived in the Southwest, and currently live in the Southmiddle. I would say there are regional tastes in sandwiches but many things s

I grew up in the Southeast, lived in the Southwest, and currently live in the Southmiddle. I would say there are regional tastes in sandwiches but many things seem to be universal. For instance, the sandwich you describe I've had in variations everywhere I've lived. It's just a roast beef sandwich. The only real differences I suspect are the use in locally obtained ingredients that have a huge potential to making the sandwich different from region to region. That may be why what is essentially a universal sandwich could be better in one place than another. I shall have to remember your recommendation if I ever find myself in the Boston area. As for your question, growing up in the Southeast the best I can offer off the top of my head is the pulled pork sandwich. There are far more variations than you describe for your beef sandwich. I've seen the sandwich offered in the other areas I've lived, obviously, but not as prevalent as in the Southeast. My wife claims nothing matches pulled pork sandwiches from this one place from her childhood in small town Alabama. I can't say which sandwich for the Southwest as I lived in Vegas and that place is not based in reality. As for Southmiddle, gourmet hamburgers seems to be the current sandwich fad.