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

Execution · Grand Arena
Modern arena shooter built on aim and loadouts.

Execution · Pure Mechanics
A fast arena shooter where raw aim and movement meet item-control strategy.
Call of Duty: Modern Warfare II leans Execution (Grand Arena); Unreal Tournament 2004 leans Execution (Pure Mechanics).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Call of Duty: Modern Warfare II
Sub-second TTK demands precise tracking
Unreal Tournament 2004
Aimbot plus perfect dodging trivializes arena duels
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Call of Duty: Modern Warfare II
Holding angles vs aggression is mind game
Unreal Tournament 2004
Predicting human movement and timing in duels matters
Call of Duty: Modern Warfare II leans a little harder on variance, though the gap is small.
Call of Duty: Modern Warfare II
Spawn logic and SBMM shuffle outcomes
Unreal Tournament 2004
Spawns and item timers are knowable, little hidden
Call of Duty: Modern Warfare II leans a little harder on optimization, though the gap is small.
Call of Duty: Modern Warfare II
Gunsmith attachments and perk packages
Unreal Tournament 2004
Item timing, map control, and weapon economy are studied
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.