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

Execution · Grand Arena
A football sim testing stick execution, play-call reads, and playbook optimisation against opponents.

Execution · Competitive PvP
Stick precision and constant prediction of a human opponent's tactical habits.
NFL 2K1 leans Execution (Grand Arena); Pro Evolution Soccer 2015 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.
NFL 2K1
Precise stick control on passes and jukes matters
Pro Evolution Soccer 2015
First touch, through-ball timing and finishing demand precise sticks
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
NFL 2K1
Reading a human opponent's play-calls is central
Pro Evolution Soccer 2015
Human opponents bait, switch tactics and punish habits
NFL 2K1 leans a little harder on variance, though the gap is small.
NFL 2K1
Fumbles and catch outcomes add measured chaos
Pro Evolution Soccer 2015
Deflections and referee calls add bounded chaos
NFL 2K1 leans a little harder on optimization, though the gap is small.
NFL 2K1
Playbook knowledge and matchup exploitation reward study
Pro Evolution Soccer 2015
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.