Generally mayan EEW with El Dorado are thought of as far superior to the aztec EEW with their measly 60 HP and +4 attack from Garland Wars. It's is easy to see why; mayan eagles beat FU paladins cost effectively as long resources are treated equal, while aztec eagles lose. They can also tank a lot more arrows due to the increased HP. The only situation where the aztec eagle is kind of better is that they kill villies in only 3 hits - unlike the mayan which needs 4 hits. I guess this is common knowledge but a nice detail nonetheless.
I'm thinking here that the conclusion is that aztec eagles should be used mostly as a raiding unit, and I shouldn't make it with the goal to face enemy armies with it. The mayan eagle also excels at this purpose, but can also be used as a main army component, and is even able to fight strong units like paladin and huskarl cost effectively. As long as gold is not an issue, mayan EEW beat both elite huskarls and FU paladins. It would be interesting to get some insight from players with a better understanding of the game than me.
I'm thinking here that the conclusion is that aztec eagles should be used mostly as a raiding unit, and I shouldn't make it with the goal to face enemy armies with it. The mayan eagle also excels at this purpose, but can also be used as a main army component, and is even able to fight strong units like paladin and huskarl cost effectively. As long as gold is not an issue, mayan EEW beat both elite huskarls and FU paladins. It would be interesting to get some insight from players with a better understanding of the game than me.