I could be wrong, but Erie seems to be a distant suburb of Pittsburgh (128 miles,) even though it's closer to Cleveland (102 miles.) However, if proximity is the sole criterion, it's more closely aligned to Buffalo (94 miles.)
Sports-wise, Erie is split between the Browns and the Steelers (aka, "Stillers.") Guess it depends on which team is having a better season.
There are some who say Erie is a no-man's land having no connection to any of the larger cities to the north, west or south.