head to head
Neither is meaningfully harder - they pose close to the same test. The widest gap is optimization, 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
Classic arena shooter with faction abilities.
Call of Duty: Vanguard leans Execution (Pure Mechanics); XDefiant 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
XDefiant
Fast arena TTK with no SBMM crutch
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
XDefiant
Pre-aim and pacing duels reward prediction
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Call of Duty: Vanguard
spawns and loadout drops vary
XDefiant
Minimal RNG, mostly skill outcomes
XDefiant leans a little harder on optimization, though the gap is small.
Call of Duty: Vanguard
loadout tuning and map knowledge help
XDefiant
Faction abilities and attachments tune fights
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.