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
Stick execution and reading human opponents within a meta-driven system.

Execution · Competitive PvP
A football sim testing stick control plus constant prediction of a human opponent's tactics.
FIFA 18 leans Execution (Competitive PvP); World Soccer: Winning Eleven 9 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 18
Perfect stick skill and timing dominate dribbles and finishing
World Soccer: Winning Eleven 9
First-touch timing, dribbling and shot placement decide matches
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
FIFA 18
Human opponents bait, switch tactics and counter your habits
World Soccer: Winning Eleven 9
Human opponents feint, vary tactics and punish habits
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
FIFA 18
Bounce physics and pack luck add measured chaos
World Soccer: Winning Eleven 9
Deflections and referee calls add bounded chaos
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
FIFA 18
Formation, squad chemistry and meta mechanics reward study
World Soccer: Winning Eleven 9
Formations, player roles and set pieces reward study
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.