head to head
Age of Empires II: HD Edition asks more than Fallout: New Vegas, and the gap is reads.

Optimization · Pure Optimization
A real-time strategy game where mastering build orders and economy management decides most matches.

Optimization · Pure Optimization
A faction-driven RPG-shooter where build and route planning shape every ending.
Age of Empires II: HD Edition leans Optimization (Pure Optimization); Fallout: New Vegas leans Optimization (Pure Optimization).
Age of Empires II: HD Edition leans a little harder on execution, though the gap is small.
Age of Empires II: HD Edition
click speed and micro help but secondary
Fallout: New Vegas
Shooter inputs with VATS assist
Age of Empires II: HD Edition leans clearly harder on reads.
Age of Empires II: HD Edition
predicting human opponent strategy and timing
Fallout: New Vegas
Scripted factions and enemies
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Age of Empires II: HD Edition
minor map and resource randomness
Fallout: New Vegas
Some loot and crit RNG
Age of Empires II: HD Edition leans a little harder on optimization, though the gap is small.
Age of Empires II: HD Edition
build orders and economy are near-solvable
Fallout: New Vegas
Faction routing, perks, builds heavily rewarded
A matching score does not mean a matching test. Two games can both sit at 10 on execution and demand completely different things of you - which is why the reasoning above matters more than the number beside it.