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
Execution on the ball plus constant prediction of the other player's shape.

Execution · Competitive PvP
A wrestling game testing grapple timing and prediction in versus matches.
Pro Evolution Soccer 2009 leans Execution (Competitive PvP); WCW vs. nWo: World Tour 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.
Pro Evolution Soccer 2009
Close control and finishing windows demand stick precision
WCW vs. nWo: World Tour
Grapple timing and move inputs need precision
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Pro Evolution Soccer 2009
Online and couch opponents adjust tactics against you
WCW vs. nWo: World Tour
Versus play rewards reading opponent grapple attempts
WCW vs. nWo: World Tour leans a little harder on variance, though the gap is small.
Pro Evolution Soccer 2009
Ricochets and keeper parries add small randomness
WCW vs. nWo: World Tour
Move reversals and spirit meter add randomness
WCW vs. nWo: World Tour leans a little harder on optimization, though the gap is small.
Pro Evolution Soccer 2009
Squad setup and tactical sliders reward preparation
WCW vs. nWo: World Tour
Move-set knowledge and stamina management matter
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.