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 hero battle royale where teamwork and aim against human opponents decides fights.

Execution · Competitive PvP
Team arena brawls testing mobile combo execution and reading enemy engages.
My Hero Ultra Rumble leans Execution (Competitive PvP); Naruto to Boruto: Shinobi Striker leans Execution (Competitive PvP).
My Hero Ultra Rumble leans a little harder on execution, though the gap is small.
My Hero Ultra Rumble
aim and combo timing in battles
Naruto to Boruto: Shinobi Striker
Aerial movement and combo timing decide 4v4 skirmishes
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
My Hero Ultra Rumble
predicting human opponent tactics
Naruto to Boruto: Shinobi Striker
Human opponents fake engages and rotations constantly
My Hero Ultra Rumble leans a little harder on variance, though the gap is small.
My Hero Ultra Rumble
item and loot drops are random
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.
My Hero Ultra Rumble
team comps and loadouts solvable
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.