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
Outplaying a human opponent through input precision and constant tactical guessing.

Execution · Competitive PvP
Class-based team shooter with deep mind games.
FIFA 22 leans Execution (Competitive PvP); Team Fortress 2 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.
FIFA 22
Perfect inputs win skill moves, timed finishing and defending
Team Fortress 2
Projectile aim and rocket jumps reward hands
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
FIFA 22
Outguessing a human's passing and defensive habits is the edge
Team Fortress 2
Spy/sniper duels are pure prediction
FIFA 22 leans a little harder on variance, though the gap is small.
FIFA 22
Deflections, ref calls and pack luck inject real randomness
Team Fortress 2
Random crits and spread inject RNG
Team Fortress 2 leans a little harder on optimization, though the gap is small.
FIFA 22
Formations, tactics and squad building sit underneath the duel
Team Fortress 2
Class loadouts and map routes 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.