The Philly is a Regional Sandwich.
Have had a 'Philly' but usually a Smart Yankee Boy pops up and says this ain't a real Philly.
They are much better in Philly.
They probably are!
The Hamburger - Cheeseburger is a National -International sandwich.
Let's go local , again.
Here in NM the Green Chile Cheeseburger is the Cats Meow.
New Mexico Green Chile Cheeseburger Trail | New Mexico True
We got the Green Chile Cheeseburger Trail.
But if you ain't been here it's unlikely that you ever had one!
Go West of Albuquerque on I40 to the Laguna Reservation. Go into a Gas Station Convenience Store where you can get the Laguna Burger.
The Regular one is 1/2 Pound of loaded Cheeseburger Goodness.
I usually get the Wimp, a mere 1/3 Pound.