head to head
Neither is simply harder - they are hard in different places. Fantasy Strike demands more reads; Naruto Shippuden: Ultimate Ninja Storm 4 demands more execution.

Reads · Pure Mind Games
A deliberately simplified fighter that removes execution barriers entirely, leaving pure reads and opponent modelling as the only axis.

Reads · Competitive PvP
Anime arena fighter where managing the substitution gauge is the real duel.
Fantasy Strike leans Reads (Pure Mind Games); Naruto Shippuden: Ultimate Ninja Storm 4 leans Reads (Competitive PvP).
Naruto Shippuden: Ultimate Ninja Storm 4 leans clearly harder on execution.
Fantasy Strike
Inputs are single-button simplified; execution is not a barrier
Naruto Shippuden: Ultimate Ninja Storm 4
Simple inputs; movement and substitution timing matter
Fantasy Strike leans clearly harder on reads.
Fantasy Strike
Stripped-down design amplifies pure opponent modelling and reads
Naruto Shippuden: Ultimate Ninja Storm 4
Versus humans, baiting substitutions is the core game
Naruto Shippuden: Ultimate Ninja Storm 4 leans a little harder on variance, though the gap is small.
Fantasy Strike
No RNG; all mechanics are transparent and simple
Naruto Shippuden: Ultimate Ninja Storm 4
Minor support-assist chaos
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Fantasy Strike
Character counterpick knowledge is limited given small roster
Naruto Shippuden: Ultimate Ninja Storm 4
Team composition and matchup knowledge
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.