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 · Pure Mechanics
A fast-paced military shooter where twitch aim against other players is the core test.

Execution · Pure Mechanics
An arena shooter built on precision aim and power-weapon map control.
Call of Duty: Vanguard leans Execution (Pure Mechanics); Halo Infinite 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: Vanguard
aim and reflexes decide most engagements
Halo Infinite
Precision aim and strafe duels dominate.
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Call of Duty: Vanguard
predicting human opponent positioning
Halo Infinite
Adaptive opponents around power weapon timings.
Halo Infinite leans a little harder on variance, though the gap is small.
Call of Duty: Vanguard
spawns and loadout drops vary
Halo Infinite
Spawn flips and weapon drops add noise.
Halo Infinite leans a little harder on optimization, though the gap is small.
Call of Duty: Vanguard
loadout tuning and map knowledge help
Halo Infinite
Map control, weapon timers, and team callouts.
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.