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
Stick-skill football against human opponents whose habits must be read.

Execution · Competitive PvP
Deliberate build-up execution and human prediction over tactical foundations.
FIFA Soccer 13 leans Execution (Competitive PvP); Pro Evolution Soccer 2011 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 13
Ball control and finishing inputs decide moments
Pro Evolution Soccer 2011
Manual passing and finishing reward precise stick work
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
FIFA Soccer 13
Online humans keep adjusting their patterns
Pro Evolution Soccer 2011
Outguessing a human's defensive shape decides versus matches
FIFA Soccer 13 leans a little harder on variance, though the gap is small.
FIFA Soccer 13
First-touch randomness and deflections add chaos
Pro Evolution Soccer 2011
Ball physics injects modest match-to-match noise
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
FIFA Soccer 13
Tactics and squad setup are a studied layer
Pro Evolution Soccer 2011
Tactical setups and player roles form the baseline
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.