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 · Grand Arena
Team-based 5v5 Star Wars starfighter combat with cockpit power management.

Execution · Pure Mechanics
Classic arena shooter with faction abilities.
Star Wars: Squadrons leans Execution (Grand Arena); XDefiant leans Execution (Pure Mechanics).
XDefiant leans a little harder on execution, though the gap is small.
Star Wars: Squadrons
Drifting, aim, and throttle tricks decide dogfights
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.
Star Wars: Squadrons
Human pilots in 5v5 bait, juke, and counter-adapt
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.
Star Wars: Squadrons
Full information maps; little randomness
XDefiant
Minimal RNG, mostly skill outcomes
Star Wars: Squadrons leans a little harder on optimization, though the gap is small.
Star Wars: Squadrons
Power management and loadout meta are solvable layers
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.