Instead of arguing based on where these two armies would hypothetically collide, consider the general question: Rome vs. Mesoamericans.

If you staged battles in all the terrains on earth, from tundra to rainforest to deserts, the Roman armies would win the vast majority of battles. They fought as units, and had superior weaponry and armor. Regardless of valor or personal strength, those advantages are too great to overcome.
Even though the Roman's didn't have gunpowder, they had plenty of explosive and combusting artillery. That counts for something