The statement that most accurately summarizes the impact of military technology differences between the Spaniards and the Aztec and Inca is:
"While the Indigenous forces would number in the thousands at times when battling the Europeans, they were still no match for the military prowess of the Spaniards."
This captures the essence of the disparity in military effectiveness, despite the numerical advantage of the Indigenous forces. The Spaniards had superior military technology, such as gunpowder weapons, which played a significant role in their conquests.