head to head
Neither is meaningfully harder - they pose close to the same test. The widest gap is reads, and it is a single point.

Execution · Competitive PvP
Football sim testing stick execution and reading a human opponent's tactical habits.

Execution · Competitive PvP
Execution on the ball plus constant prediction of the other player's shape.
FIFA Soccer 11 leans Execution (Competitive PvP); Pro Evolution Soccer 2009 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 Soccer 11
Pass timing, dribbling and finishing demand stick skill
Pro Evolution Soccer 2009
Close control and finishing windows demand stick precision
FIFA Soccer 11 leans a little harder on reads, though the gap is small.
FIFA Soccer 11
Human opponents' defensive habits and attacking patterns must be modelled
Pro Evolution Soccer 2009
Online and couch opponents adjust tactics against you
FIFA Soccer 11 leans a little harder on variance, though the gap is small.
FIFA Soccer 11
Deflections and keeper behaviour add bounded chaos
Pro Evolution Soccer 2009
Ricochets and keeper parries add small randomness
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
FIFA Soccer 11
Formations, tactics and squad knowledge shape matches
Pro Evolution Soccer 2009
Squad setup and tactical sliders reward preparation
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.