The Aztec and Inca civilizations had several similarities in their environmental and cultural impacts. One key point of similarity is that both civilizations significantly altered their environments to improve agricultural productivity. The Aztecs developed chinampas, or floating gardens, to maximize agricultural output in the lakes of the Valley of Mexico, while the Incas employed terracing to cultivate crops on steep Andean slopes.
In terms of cultural impacts, both civilizations had polytheistic religions that included sun worship, reflecting the importance of agriculture and the sun in their respective societies. They also developed complex social and political structures and made significant achievements in architecture, evident in their impressive constructions, such as the Aztec temples and the Incan stoneworks.
Overall, both civilizations demonstrated advanced environmental manipulation for farming and shared cultural elements like sun worship and complex societal organization. However, some specific aspects listed in your responses, such as using dikes, growing corn, and specific construction techniques, may not apply uniformly to both cultures, requiring careful examination of their unique practices.