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.

Reads · Competitive PvP
Anime arena fighter where managing the substitution gauge is the real duel.

Execution · Competitive PvP
An online multiplayer soccer game about positioning and outplaying human opponents.
Naruto Shippuden: Ultimate Ninja Storm 4 leans Reads (Competitive PvP); Soccer Online: Ball 3D leans Execution (Competitive PvP).
Soccer Online: Ball 3D leans a little harder on execution, though the gap is small.
Naruto Shippuden: Ultimate Ninja Storm 4
Simple inputs; movement and substitution timing matter
Soccer Online: Ball 3D
Controlling shots and movement precisely matters in matches
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Naruto Shippuden: Ultimate Ninja Storm 4
Versus humans, baiting substitutions is the core game
Soccer Online: Ball 3D
Outguessing human opponents' passes and positioning is constant
Soccer Online: Ball 3D leans a little harder on variance, though the gap is small.
Naruto Shippuden: Ultimate Ninja Storm 4
Minor support-assist chaos
Soccer Online: Ball 3D
Some physics unpredictability but mostly skill-driven
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Naruto Shippuden: Ultimate Ninja Storm 4
Team composition and matchup knowledge
Soccer Online: Ball 3D
Team coordination and positioning tactics reward 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.