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
A football simulation testing ball control, tactics and reading opponents.

Execution · Pure Mechanics
Classic WWII shooter whose objective-based multiplayer defined a genre.
Pro Evolution Soccer 2011 3D leans Execution (Competitive PvP); Return to Castle Wolfenstein leans Execution (Pure Mechanics).
Return to Castle Wolfenstein leans a little harder on execution, though the gap is small.
Pro Evolution Soccer 2011 3D
Passing, shooting and dribbling controls demand timing
Return to Castle Wolfenstein
Fast strafing and precise hitscan aim dominate duels
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Pro Evolution Soccer 2011 3D
Human opponents must be outguessed in real time
Return to Castle Wolfenstein
Multiplayer objective pushes hinge on outguessing human defense
Pro Evolution Soccer 2011 3D leans a little harder on variance, though the gap is small.
Pro Evolution Soccer 2011 3D
Deflections and physics add measured unpredictability
Return to Castle Wolfenstein
Fixed objectives and scripted singleplayer enemies, little randomness
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Pro Evolution Soccer 2011 3D
Formations and tactics reward strategic planning
Return to Castle Wolfenstein
Objective timings, class roles, and routes reward planning
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.