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
Battle royale built on COD's tight gunplay.

Execution · Grand Arena
Build-fight battle royale with deep mechanics.
Call of Duty: Warzone leans Execution (Grand Arena); Fortnite leans Execution (Grand Arena).
Call of Duty: Warzone leans a little harder on execution, though the gap is small.
Call of Duty: Warzone
Long-range gunfights reward perfect aim
Fortnite
Build-edit-aim combos punish slow hands
Fortnite leans a little harder on reads, though the gap is small.
Call of Duty: Warzone
Rotations and third-party reads decide fights
Fortnite
Box fights are pure adaptive mind games
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Call of Duty: Warzone
Drops, loot, circles inject real RNG
Fortnite
Loot drops, storm, item rotations vary
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Call of Duty: Warzone
Meta loadouts and rotations heavily solved
Fortnite
Loadouts, mats economy, rotations solvable
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.