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

Execution · Competitive PvP
Team arena brawls testing mobile combo execution and reading enemy engages.
Dragon Ball: Xenoverse leans Execution (Practiced Mastery); Naruto to Boruto: Shinobi Striker 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.
Dragon Ball: Xenoverse
3D arena combos, vanishes and ki management need practiced hands
Naruto to Boruto: Shinobi Striker
Aerial movement and combo timing decide 4v4 skirmishes
Naruto to Boruto: Shinobi Striker leans a little harder on reads, though the gap is small.
Dragon Ball: Xenoverse
Online PvP rewards predicting human mixups; PvE is scripted
Naruto to Boruto: Shinobi Striker
Human opponents fake engages and rotations constantly
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 to Boruto: Shinobi Striker
Some matchmaking and map objective randomness
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Dragon Ball: Xenoverse
Build crafting and attribute allocation shape PvP viability
Naruto to Boruto: Shinobi Striker
Class loadouts and jutsu matchups reward study
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.