It is impossible to say definitively whether a Cane Corso will always overpower a Doberman. Individual dogs vary in size, temperament, and training, and circumstances heavily influence the outcome.
A well-trained Doberman could hold its own against a Cane Corso, especially if the Cane Corso is not similarly trained. Dog fights are dangerous for all involved, and both breeds require responsible ownership, socialization, and proper handling.
Rather than focusing on which breed is stronger, prioritize responsible dog ownership and safety.