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 · Competitive PvP
An arcade soccer game testing ball control and prediction against opponents.

Execution · Competitive PvP
Shot timing and play selection against opponents adjusting to your tendencies.
International Superstar Soccer 2 leans Execution (Competitive PvP); NBA 2K14 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.
International Superstar Soccer 2
Passing, shooting and dribbling timing decides plays
NBA 2K14
Shot release timing and dribble chains gate scoring
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
International Superstar Soccer 2
Human opponents juke and feint, demanding prediction
NBA 2K14
Online opponents counter your favourite plays
International Superstar Soccer 2 leans a little harder on variance, though the gap is small.
International Superstar Soccer 2
Ball physics and deflections add some chaos
NBA 2K14
Shot RNG sways close possessions
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
International Superstar Soccer 2
Formations, tactics and build-up play matter underneath
NBA 2K14
Playbook knowledge and roster management 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.