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
Football sim testing execution and opponent reading under a studied tactical meta.

Execution · Competitive PvP
Open-zone gunfights where aim, ambush prediction and gear economy all matter.
FIFA 21 leans Execution (Competitive PvP); Stalcraft: X leans Execution (Competitive PvP).
Stalcraft: X leans a little harder on execution, though the gap is small.
FIFA 21
Skill moves and finishing mechanics demand practiced hands
Stalcraft: X
Gunfights against other stalkers reward raw aim and movement
FIFA 21 leans a little harder on reads, though the gap is small.
FIFA 21
Outguessing a human's defensive shape and attacking patterns is central
Stalcraft: X
Open-zone PvP means predicting ambushes from adapting humans
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
FIFA 21
Deflections, finishing RNG and pack luck colour outcomes
Stalcraft: X
Anomalies, artifact spawns and who you meet inject randomness
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
FIFA 21
Meta formations, custom tactics and squad building are studied deeply
Stalcraft: X
Gear economy, artifact builds and route knowledge compound
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.