It is impossible to definitively say that a pit bull's bite is stronger than a Siberian husky's. Bite force depends on many factors, including the dog's size, weight, individual anatomy, and the situation. Breed generalizations are misleading because dogs vary widely within any breed.
More important than bite strength are factors like temperament, training, socialization, and responsible ownership. Any dog can bite if it feels threatened or is poorly trained.
Focus on proper socialization, obedience training, and understanding dog body language to reduce bite risk regardless of breed.