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

Execution · Competitive PvP
A flashy arena fighter testing reaction timing and substitution mind-games against humans.

Execution · Competitive PvP
Twitch ball control plus constant prediction of human defenders on known maps.
Naruto x Boruto: Ultimate Ninja Storm Connections leans Execution (Competitive PvP); TagPro leans Execution (Competitive PvP).
TagPro leans a little harder on execution, though the gap is small.
Naruto x Boruto: Ultimate Ninja Storm Connections
Combo timing and substitution reactions decide exchanges
TagPro
Ball handling, boosts and juke precision decide grabs
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Naruto x Boruto: Ultimate Ninja Storm Connections
Human opponents bait substitutions and punish habits
TagPro
Human defenders adapt to your routes every match
Naruto x Boruto: Ultimate Ninja Storm Connections leans a little harder on variance, though the gap is small.
Naruto x Boruto: Ultimate Ninja Storm Connections
Little hidden beyond occasional support-assist surprises
TagPro
Maps and power-up timers are fully visible
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Naruto x Boruto: Ultimate Ninja Storm Connections
Team composition and meter management reward system knowledge
TagPro
Map routes, button plays and power-up timing are studyable
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.