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

Execution · Competitive PvP
Grapple timing and reversal prediction against human opponents in the ring.
Dragon Ball Z: Budokai 3 leans Execution (Competitive PvP); WWF War Zone 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.
Dragon Ball Z: Budokai 3
Combo execution, teleport counters and beam timing demand hands
WWF War Zone
Move inputs and reversal timing decide exchanges
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
WWF War Zone
Human opponents bait grapples and reversals constantly
WWF War Zone leans a little harder on variance, though the gap is small.
Dragon Ball Z: Budokai 3
Almost nothing random beyond minor clash inputs
WWF War Zone
Minor hit randomness in grapple trades
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
WWF War Zone
Learning each wrestler's movelist and counters is the homework
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.