Lost Weekend - S5-E2
Continuity mistake: At the end of the episode, the airport staff member (visible in the background) announces that the final boarding for Dawson's flight is at gate C-3. As the scene ends, the camera pulls away to reveal the gate number to be B-1.
Answer: It's the same apartment Joey had in NYC. Comparing it to the beginning of the Finale; you can tell it's exactly the same location, furnishings, Plasma TV etc. Apparently Chris was only living with her at HER apartment, and now Pacey has taken his place at the end. I guess this implies Pacey successfully started his own restaurant business in NYC as he had dreamed, to be with Joey.