head to head
Neither is meaningfully harder - they pose close to the same test. The widest gap is reads, and it is a single point.

Execution · Competitive PvP
Stick execution and reading human opponents within a meta-driven system.

Execution · Competitive PvP
A football simulation testing ball control, tactics and reading opponents.
FIFA 18 leans Execution (Competitive PvP); Pro Evolution Soccer 2011 3D 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
Pro Evolution Soccer 2011 3D
Passing, shooting and dribbling controls demand timing
FIFA 18 leans a little harder on reads, though the gap is small.
FIFA 18
Human opponents bait, switch tactics and counter your habits
Pro Evolution Soccer 2011 3D
Human opponents must be outguessed in real time
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
Pro Evolution Soccer 2011 3D
Deflections and physics add measured unpredictability
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
Pro Evolution Soccer 2011 3D
Formations and tactics reward strategic planning
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.