Thanks for the response! I was curious, because ever since moving from the Philadelphia area almost 5 years ago, I've been sort of intrigued.

It seems as if every place that serves a Philly cheesesteak puts - at minimum - lettuce, tomato, and onion on it; most I've seen put mayo as well. In and around Philadelphia, that's a Cheesesteak Hoagie, or sub in Maryland. A classic standard cheesesteak is just the meat and cheese, but it's very rare to find any place in the Baltimore area that serves it that way by default.

Ultimately not a big deal, and I've learned how I need to order to get what I'm looking for. It's just been interesting seeing how consistent it seems to be.