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
An anime fighter testing combo execution and counter-baiting against human opponents.

Execution · Competitive PvP
A crossover anime arena fighter pitting Shonen Jump heroes against each other.
Dragon Ball Z: Budokai 3 leans Execution (Competitive PvP); Jump Force leans Execution (Competitive PvP).
Dragon Ball Z: Budokai 3 leans a little harder on execution, though the gap is small.
Dragon Ball Z: Budokai 3
Combo execution, teleport counters and beam timing demand hands
Jump Force
3D arena combos with generous tracking
Dragon Ball Z: Budokai 3 leans a little harder on reads, though the gap is small.
Dragon Ball Z: Budokai 3
Versus humans, baiting teleports and guessing cancels decides exchanges
Jump Force
Human opponents force guard-break guessing
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Dragon Ball Z: Budokai 3
Almost nothing random beyond minor clash inputs
Jump Force
Full information arena duels
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Dragon Ball Z: Budokai 3
Capsule builds and matchup knowledge underpin competitive play
Jump Force
Team picks and awakening meter management
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.