Final answer:
Winston observes that Party prisoners are treated differently and have less freedom compared to common criminals in the prison.
Step-by-step explanation:
Winston observes a difference between the Party prisoners and the "common criminals" in the prison where he is first taken after his arrest.
The Party prisoners, which include intellectuals and political dissidents, are treated with more respect and given better treatment compared to the "common criminals." They are seen as threats to the Party and are therefore isolated and closely monitored.
On the other hand, the "common criminals" are considered less dangerous to the Party and are allowed to mix with each other. They have more freedom to interact and engage in illicit activities within the prison.