Final answer:
Tecuciztecatl and Nanahuatzin are both gods associated with the sun, but Tecuciztecatl is considered superior. Their differences influence the outcome of the story as Tecuciztecatl becomes the sun, while Nanahuatzin becomes the moon.
Step-by-step explanation:
Tecuciztecatl and Nanahuatzin are both gods associated with the sun, but they have some key differences. Tecuciztecatl is considered superior to Nanahuatzin. In the Aztec mythology, Tecuciztecatl is associated with the sun's bright side and Nanahuatzin with the sun's dark side. Their differences influence the outcome of the story as Tecuciztecatl's superiority leads to him being chosen to become the sun, while Nanahuatzin is sacrificed and becomes the moon.