You'll get full BE service on both DL60/61 with dinner and breakfast. Dinner service tends to be rushed in both directions so they can get the lights out.

Departing GIG, you'll have access to the Air France lounge. There's free wifi (check the desk for the code) and a help-yourself bar. I didn't get to visit the lounge in October because I was running extremely late...I thought I was going to have to (I mean, get to) spend another night in Rio. I ran into another FTer at baggage claim in ATL who's an expert on this route (JBCarioca), and he mentioned that the food items were being taken away after the AF flight leaves GIG, but before the DL flight.

This route now has the 767-400, which is the normal seasonal adjustment.