I just returned to Boston after 5 weeks in Pittsburgh so I can comment about both areas.
My first day of the trip, I drove from Boston to Wilkes-Barre, PA (which is in the Scranton area, there's a President Joe Biden Expressway as he grew up there) and I paid $2.79 per gallon. Then, I drove to Pittsburgh and entered into Gas Price Hell.
Pittsburgh was, for the most part, $3.69 per gallon. I was told that it's due to "Pennsylvania having the highest state gas tax in the nation". Which made no sense since I had just paid 90 cents less per gallon in a different area of the same state.
But then I consulted my Gas Buddy ap and saw that a station right near where I was staying, the Sunoco at 340 Curry Hollow Rd in near suburb Baldwin was charging $3.29 per gallon and, if using your "linked to your checking account" Gas Buddy card, there's an additional 17 cents discount so I ended up paying $3.12 per gallon.
There's a Get Go gas station chain in and around Pittsburgh where you can get a 30 cents discount if you use your Giant Eagle (a supermarket chain) card (also linked to your checking account) and sometimes the Get Go price was listed at $3.49 per gallon so that, with the 30 cent discount, you end up paying $3.19 per gallon.
But Pittsburghers don't seem to comparison shop as the $3.69 stations were well used.
Back in Boston, the prices range between $2.99 to $3.19 for the most part. But Gas Buddy identified for me a nearby station that listed a $2.79 price but with a 17 cent Gas Buddy discount such that I paid $2.62 per gallon.