Final answer:
Winston believes the proles are different from Party members because they have the potential to overthrow the Party due to their relative freedom and humanity, while Party members are thoroughly indoctrinated and controlled.
Step-by-step explanation:
Winston proclaims that the difference between the proles and the Party members is that the proles are the only group with the potential to overthrow the Party and change the society in George Orwell's 1984. While Party members are completely indoctrinated and controlled, the proles retain a degree of freedom and humanity, and thus the capacity for rebellion. This concept echoes Marxist beliefs where proletariats have the revolutionary potential to challenge and overturn the bourgeoisie, the class that owns the means of production and thus controls society. In Orwell's dystopian society, members of the Party are subjected to intense indoctrination, relentless surveillance, and stringent control over every aspect of their lives, which prevents them from recognizing their oppression and bars them from considering rebellion. The proles, on the other hand, are largely ignored by the Party as they are not seen as a threat, allowing them the space to possibly instigate change if they become conscious of their collective strength and the Party's manipulation.