First you have to get them upgraded to 3 moves.
There is no firstly, you either win or loose in the first 30 moves.
Winrate Aztec 100%, win rate Nubia 90%
Simples
Nubia gets way more war weariness and Aztecs are no maintenance... no gold to maintain... that makes a big diff early.
But finally we get to double shot 2 movement crossbow vs +12-20 knights with barding. That’s 52 vs 70 odd....and on defence...because you only move 2 you do not get double shot or rangedso in reality the knight is70vs30, guaranteed one shot in the open.... oh my
The speed Aztec knights can take cities and their stamina due to not taking so much damage is just beyond a joke.
Nubia has maybe 50 turns of usefulness
Need a spaceport, less than one builder worth of charges gets you one, crickey, build 5
Nubia is really good at what victory condition... only domination zzzzzz
That pyramid makes me giggle... nice desert start, you can get excited and build Petra... and get +1 era for settling in rubbish land, nice.
Aztecs are just start to end awesome, and just to clarify, I am not an Aztec fan, they are an OP civ I have to play every now and then due to GOTM or random everything deity, too strong to be challenging, I will play Nubia every now and then because I know I have to start well, save cash, and make he most of early aggression which can be hard sometimes.
... perhaps you do not appreciate how much I play.