head to head
Neither is harder. They score identically on all four axes, so the difference between them is in kind, not degree.

Execution · Competitive PvP
Retro international football sim with team management basics.

Execution · Competitive PvP
Execution on the ball plus constant prediction of the other player's shape.
Football International 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.
Football International
passing and shooting input precision
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.
Football International
reading human opponent's attacking patterns
Pro Evolution Soccer 2009
Online and couch opponents adjust tactics against you
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Football International
minor bounce and ref randomness
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.
Football International
formation and substitution strategy
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.