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 · Competitive PvP
WWI conquest shooter with weighty gunplay.

Execution · Competitive PvP
Football sim testing execution and opponent reading under a studied tactical meta.
Battlefield 1 leans Execution (Competitive PvP); FIFA 21 leans Execution (Competitive PvP).
Battlefield 1 leans a little harder on execution, though the gap is small.
Battlefield 1
Bolt-actions reward steady aim and timing
FIFA 21
Skill moves and finishing mechanics demand practiced hands
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 21
Outguessing a human's defensive shape and attacking patterns is central
FIFA 21 leans a little harder on variance, though the gap is small.
Battlefield 1
Behemoth spawns and chaos shift matches
FIFA 21
Deflections, finishing RNG and pack luck colour outcomes
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Battlefield 1
Class kits and vehicle counters matter
FIFA 21
Meta formations, custom tactics and squad building are studied deeply
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.