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
An anime arena fighter testing team-switch timing and counter prediction against humans.

Execution · Competitive PvP
Execution on the ball plus constant prediction of the other player's shape.
One Piece: Burning Blood leans Execution (Competitive PvP); Pro Evolution Soccer 2009 leans Execution (Competitive PvP).
Pro Evolution Soccer 2009 leans a little harder on execution, though the gap is small.
One Piece: Burning Blood
Combo timing and guard breaks need moderate hands
Pro Evolution Soccer 2009
Close control and finishing windows demand stick precision
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
One Piece: Burning Blood
Human opponents bait switches and counters constantly
Pro Evolution Soccer 2009
Online and couch opponents adjust tactics against you
Pro Evolution Soccer 2009 leans a little harder on variance, though the gap is small.
One Piece: Burning Blood
Full-information arena with no hidden state
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.
One Piece: Burning Blood
Team composition and Devil Fruit matchups reward study
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.