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 arena shooter where twitch aim and movement against human opponents is everything.

Execution · Pure Mechanics
Classic arena shooter with faction abilities.
Unreal Tournament 2003 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.
Unreal Tournament 2003
aim and movement speed decide duels
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.
Unreal Tournament 2003
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.
Unreal Tournament 2003
weapon and pickup spawns vary
XDefiant
Minimal RNG, mostly skill outcomes
XDefiant leans a little harder on optimization, though the gap is small.
Unreal Tournament 2003
map control and item timing solvable
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.