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
Simple-input arena fighting decided by baiting human defensive resources.
Jump Force leans Execution (Competitive PvP); Naruto Shippuden: Ultimate Ninja Storm Revolution 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 Revolution
Combo and counter timing on intentionally simple inputs
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 Revolution
Baiting a human's substitutions and guard breaks matters
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 Revolution
Fully visible fights with nothing hidden
Jump Force leans a little harder on optimization, though the gap is small.
Jump Force
Team picks and awakening meter management
Naruto Shippuden: Ultimate Ninja Storm Revolution
Team and awakening type picks are a shallow solvable layer
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.