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
Stick precision and constant prediction of a human opponent's tactical habits.

Execution · Competitive PvP
Simulation-styled WWE entry praised for its showcase mode and refined reversal-based combat.
Pro Evolution Soccer 2015 leans Execution (Competitive PvP); WWE 2K19 leans Execution (Competitive PvP).
Pro Evolution Soccer 2015 leans a little harder on execution, though the gap is small.
Pro Evolution Soccer 2015
First touch, through-ball timing and finishing demand precise sticks
WWE 2K19
Reversal timing windows and combo execution
Pro Evolution Soccer 2015 leans a little harder on reads, though the gap is small.
Pro Evolution Soccer 2015
Human opponents bait, switch tactics and punish habits
WWE 2K19
Human versus matches hinge on counter 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 2015
Deflections and referee calls add bounded chaos
WWE 2K19
Slight randomness in pin kick-outs and AI
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Pro Evolution Soccer 2015
Formations, player roles and set pieces reward study
WWE 2K19
Payback systems, move-set knowledge and MyPlayer builds
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.