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
Precise stick control plus constant adaptation to a human opponent's tactics.

Execution · Competitive PvP
Milsim 50v50 team-tactical shooter.
Pro Evolution Soccer 2019 leans Execution (Competitive PvP); Squad leans Execution (Competitive PvP).
Squad leans a little harder on execution, though the gap is small.
Pro Evolution Soccer 2019
Dribble touch, pass weight and finishing demand precise sticks
Squad
Bullet drop, sway, suppression test aim
Squad leans a little harder on reads, though the gap is small.
Pro Evolution Soccer 2019
Human opponents adapt formations and punish predictable patterns
Squad
Squad tactics versus humans demand prediction
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Pro Evolution Soccer 2019
Deflections and keeper randomness add bounded chaos
Squad
Minimal RNG, comm-driven outcomes
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Pro Evolution Soccer 2019
Tactics, instructions and set-piece routines reward study
Squad
Logistics, FOB placement, kit choice deep
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.