head to head
Naruto Shippuden: Ultimate Ninja Storm 4 asks more than Dragon Ball: Xenoverse, and the gap is reads.

Execution · Practiced Mastery
An arena fighter mixing combo execution, build grinding and human prediction online.

Reads · Competitive PvP
Anime arena fighter where managing the substitution gauge is the real duel.
Dragon Ball: Xenoverse leans Execution (Practiced Mastery); Naruto Shippuden: Ultimate Ninja Storm 4 leans Reads (Competitive PvP).
Dragon Ball: Xenoverse leans a little harder on execution, though the gap is small.
Dragon Ball: Xenoverse
3D arena combos, vanishes and ki management need practiced hands
Naruto Shippuden: Ultimate Ninja Storm 4
Simple inputs; movement and substitution timing matter
Naruto Shippuden: Ultimate Ninja Storm 4 leans clearly harder on reads.
Dragon Ball: Xenoverse
Online PvP rewards predicting human mixups; PvE is scripted
Naruto Shippuden: Ultimate Ninja Storm 4
Versus humans, baiting substitutions is the core game
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Dragon Ball: Xenoverse
Skill drops from missions roll randomly
Naruto Shippuden: Ultimate Ninja Storm 4
Minor support-assist chaos
Dragon Ball: Xenoverse leans a little harder on optimization, though the gap is small.
Dragon Ball: Xenoverse
Build crafting and attribute allocation shape PvP viability
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.