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

Execution · Competitive PvP
A crossover anime arena fighter pitting Shonen Jump heroes against each other.

Execution · Competitive PvP
Substitution baiting against humans atop simple anime-fighter inputs and team picks.
Jump Force leans Execution (Competitive PvP); Naruto Shippuden: Ultimate Ninja Storm 2 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.
Jump Force
3D arena combos with generous tracking
Naruto Shippuden: Ultimate Ninja Storm 2
Timing substitutions and combos matters but inputs are simple
Jump Force leans a little harder on reads, though the gap is small.
Jump Force
Human opponents force guard-break guessing
Naruto Shippuden: Ultimate Ninja Storm 2
Versus humans, baiting substitutions is the real layer
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Jump Force
Full information arena duels
Naruto Shippuden: Ultimate Ninja Storm 2
Nothing hidden once both characters are known
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Jump Force
Team picks and awakening meter management
Naruto Shippuden: Ultimate Ninja Storm 2
Team composition and chakra management have solvable lines
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.