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 · Grand Arena
A hero shooter where teams brawl over objectives using locked ability kits.

Execution · Competitive PvP
Class-based team shooter with deep mind games.
Overwatch 2 leans Execution (Grand Arena); Team Fortress 2 leans Execution (Competitive PvP).
Overwatch 2 leans a little harder on execution, though the gap is small.
Overwatch 2
Aim and ability timing decide most duels.
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.
Overwatch 2
Adaptive enemy comp counters and ult baiting.
Team Fortress 2
Spy/sniper duels are pure prediction
Team Fortress 2 leans a little harder on variance, though the gap is small.
Overwatch 2
Minimal randomness, mostly map and matchmaking.
Team Fortress 2
Random crits and spread inject RNG
Overwatch 2 leans a little harder on optimization, though the gap is small.
Overwatch 2
Comp building, ult economy, and cooldown tracking.
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.