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

Execution · Competitive PvP
Reversal-timing wrestling that becomes a prediction game against humans.
Pro Evolution Soccer 2009 leans Execution (Competitive PvP); WWE SmackDown! Shut Your Mouth leans Execution (Competitive PvP).
Pro Evolution Soccer 2009 leans a little harder on execution, though the gap is small.
Pro Evolution Soccer 2009
Close control and finishing windows demand stick precision
WWE SmackDown! Shut Your Mouth
Grapple timing and reversals reward quick hands
Pro Evolution Soccer 2009 leans a little harder on reads, though the gap is small.
Pro Evolution Soccer 2009
Online and couch opponents adjust tactics against you
WWE SmackDown! Shut Your Mouth
Versus friends, reversal baiting becomes a prediction game
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Pro Evolution Soccer 2009
Ricochets and keeper parries add small randomness
WWE SmackDown! Shut Your Mouth
Mild AI and momentum 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 2009
Squad setup and tactical sliders reward preparation
WWE SmackDown! Shut Your Mouth
Move-set knowledge and momentum management are learnable
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.