Continuity mistake: Near the end of the episode when Audrey goes into the dorm bathroom to empty the whiskey bottle, she accidently drops it on the bathroom floor. You can see the bottle smash, with the large label lying flat on the floor and the rest of the bottle (also with a smaller red label) sliding a little to the right. But later when Joey comes in and looks over at the broken bottle on the bathroom floor, it suddenly looks different. Most of the bottle is with the second red label part, and the first part with the larger label lying flat isn't anywhere near it.
Factual error: When Harley talks Joey into calling Eddy's parent's home in Worcester, Joey picks up the old dorm phone that has a handset cord attached. This doesn't make sense, because since Joey is calling long-distance to Worcester she would be more likely to use her cell phone which probably has a pre-paid plan. The old black phones are standard land lines, that come in the dorms; but the roommates both have cells and they also have a more modern wall phone.
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.