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 · Grand Arena
Build-fight battle royale with deep mechanics.
Execution · Competitive PvP
Destruction-heavy team shooter with cashout heists.
Fortnite leans Execution (Grand Arena); The Finals leans Execution (Competitive PvP).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Fortnite
Build-edit-aim combos punish slow hands
The Finals
Movement and aim under destruction chaos
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Fortnite
Box fights are pure adaptive mind games
The Finals
Cashout fights are three-team mind games
Fortnite leans a little harder on variance, though the gap is small.
Fortnite
Loot drops, storm, item rotations vary
The Finals
Destruction and event modifiers shake fights
Fortnite leans a little harder on optimization, though the gap is small.
Fortnite
Loadouts, mats economy, rotations solvable
The Finals
Class loadouts and gadget synergies
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.