Oldest bldg in NYC dates to 1652; in Philly, oldest building dates to 1689. In any case, neither city has a huge amount of pre-Revolutionary building stock, and both are dominated by early 20th century architecture.
But Philly has the tiny rowhouse alleys around Society Hill. NYC lacks this. Some of the mews in Brooklyn and the West Village come closest, but still have a slightly different feel.
Philly has this, which is just terrific:
https://www.google.com/maps/place/20...!4d-75.1598846
Brooklyn Mews streets are often gated, so you don't have the public access:
https://www.google.com/maps/place/1+...1!4d-73.998344