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 hip-hop themed brawler where customized fighters batter each other through New York clubs.

Execution · Competitive PvP
A flashy arena fighter testing reaction timing and substitution mind-games against humans.
Def Jam: Fight for NY leans Execution (Competitive PvP); Naruto x Boruto: Ultimate Ninja Storm Connections 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.
Def Jam: Fight for NY
Combo timing, grapple inputs, environment slams demand solid hands.
Naruto x Boruto: Ultimate Ninja Storm Connections
Combo timing and substitution reactions decide exchanges
Naruto x Boruto: Ultimate Ninja Storm Connections leans a little harder on reads, though the gap is small.
Def Jam: Fight for NY
Versus humans, baiting grabs and counters matters; AI is mappable.
Naruto x Boruto: Ultimate Ninja Storm Connections
Human opponents bait substitutions and punish habits
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Def Jam: Fight for NY
Minor stage and AI behaviour randomness.
Naruto x Boruto: Ultimate Ninja Storm Connections
Little hidden beyond occasional support-assist surprises
Def Jam: Fight for NY leans a little harder on optimization, though the gap is small.
Def Jam: Fight for NY
Fighting-style blends, move purchases, venue weapons reward system knowledge.
Naruto x Boruto: Ultimate Ninja Storm Connections
Team composition and meter management reward system 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.
full breakdown
Def Jam: Fight for NY →
full breakdown
Naruto x Boruto: Ultimate Ninja Storm Connections →