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
Play-calling mind games against a human layered over stick execution and roster planning.

Execution · Competitive PvP
Class-based team shooter with deep mind games.
All-Pro Football 2K8 leans Execution (Competitive PvP); Team Fortress 2 leans Execution (Competitive PvP).
Team Fortress 2 leans a little harder on execution, though the gap is small.
All-Pro Football 2K8
Stick skills on passes, jukes and tackles decide individual plays
Team Fortress 2
Projectile aim and rocket jumps reward hands
Team Fortress 2 leans a little harder on reads, though the gap is small.
All-Pro Football 2K8
Play-calling against a human is a genuine prediction duel
Team Fortress 2
Spy/sniper duels are pure prediction
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
All-Pro Football 2K8
Catches, fumbles and matchup rolls add per-play noise
Team Fortress 2
Random crits and spread inject RNG
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
All-Pro Football 2K8
Roster construction and playbook knowledge set the floor
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.