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 · Competitive PvP
WWI conquest shooter with weighty gunplay.

Execution · Grand Arena
A football sim where reading opponents and precise execution both decide matches.
Battlefield 1 leans Execution (Competitive PvP); FIFA 20 leans Execution (Grand Arena).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Battlefield 1
Bolt-actions reward steady aim and timing
FIFA 20
precise passing, dribbling, and shot timing
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Battlefield 1
Trench flanks and gas plays beat predictions
FIFA 20
reading human opponent tactics live
Battlefield 1 leans a little harder on variance, though the gap is small.
Battlefield 1
Behemoth spawns and chaos shift matches
FIFA 20
minor ball physics and injury randomness
FIFA 20 leans a little harder on optimization, though the gap is small.
Battlefield 1
Class kits and vehicle counters matter
FIFA 20
formations and player builds 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.