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
Tests shot-stick timing and badge-build optimization against human defenders.
My Hero Ultra Rumble leans Execution (Competitive PvP); NBA 2K20 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
NBA 2K20
Shot timing and dribble combos require practiced stick work
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
NBA 2K20
Outguessing human defenders and callers decides online possessions
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
My Hero Ultra Rumble
item and loot drops are random
NBA 2K20
Shot RNG and rebounds swing tight games
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
NBA 2K20
Builds, badges and playbook knowledge dominate MyCareer and online
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.