head to head
Neither is meaningfully harder - they pose close to the same test. The widest gap is execution, and it is a single point.

Execution · Competitive PvP
Twitch aim duels plus predicting human rotations on known maps.

Execution · Pure Mechanics
High-speed aim and movement dominance against human opponents fighting for weapon and map control.
Call of Duty: Black Ops Cold War leans Execution (Competitive PvP); Unreal Tournament (1999) leans Execution (Pure Mechanics).
Unreal Tournament (1999) leans a little harder on execution, though the gap is small.
Call of Duty: Black Ops Cold War
Snap aim and movement tech decide most gunfights
Unreal Tournament (1999)
Shock combo and flak cannon timing demand peak motor precision
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Call of Duty: Black Ops Cold War
Online opponents rotate and adapt; pre-firing them is prediction
Unreal Tournament (1999)
Human opponents continuously adapt routes and engagement choices
Call of Duty: Black Ops Cold War leans a little harder on variance, though the gap is small.
Call of Duty: Black Ops Cold War
Spawn flips and lobby randomness inject noise
Unreal Tournament (1999)
Map spawns are minor; most information is visible or predictable
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Call of Duty: Black Ops Cold War
Loadout meta and map timings form a learnable layer
Unreal Tournament (1999)
Weapon prioritisation and map control are learnable but secondary
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.