One big difference will be if you are in business or economy class. Of course, the J flyers will be first off and thru immigration and customs.

If you are on the AF operated flight, your DL connection is definitely in the same terminal, and likely also in Concourse A. If you are flying to PIT from Concourse B/C, allow an extra 15 minutes or so once out of customs.

Immigration and Customs at the MacNamara terminal usually means only one or two flights arriving at the same time, so you won't see huge lines like at a bigger international airport like ORD or JFK. That said, if you are the last one off the inbound plane and only have 90 minutes between flights, it could be a very tight connection.