head to head
Neither is simply harder - they are hard in different places. Age of Empires II: The Age of Kings demands more optimization; PUBG Mobile demands more variance.

Optimization · Grand Arena
The definitive medieval RTS where castle drops and farm economies decide empires.

Execution · Grand Arena
Battle royale survival blending aim, rotation planning, and heavy circle-and-loot RNG.
Age of Empires II: The Age of Kings leans Optimization (Grand Arena); PUBG Mobile leans Execution (Grand Arena).
PUBG Mobile leans a little harder on execution, though the gap is small.
Age of Empires II: The Age of Kings
Micro, villager management, hotkey speed
PUBG Mobile
Touchscreen aim and recoil control set the ceiling
Age of Empires II: The Age of Kings leans a little harder on reads, though the gap is small.
Age of Empires II: The Age of Kings
High-level play is predicting human openings
PUBG Mobile
Outguessing rotations and third-party timing of human squads
PUBG Mobile leans clearly harder on variance.
Age of Empires II: The Age of Kings
Fog, map gen, civ matchups
PUBG Mobile
Circle placement, loot and drop locations dominate single matches
Age of Empires II: The Age of Kings leans clearly harder on optimization.
Age of Empires II: The Age of Kings
Build orders refined over two decades
PUBG Mobile
Zone rotation theory and loadout priorities are well mapped
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.