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
Arena-fighter execution and couch-versus prediction across an enormous anime roster.

Execution · Competitive PvP
Timing-based boxing with training preparation and opponent-specific weaknesses.
Dragon Ball Z: Budokai Tenkaichi 2 leans Execution (Competitive PvP); Rocky 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 Tenkaichi 2
Beam clashes, vanish timing and arena movement reward fast hands
Rocky
Punch timing, blocking, and stamina control lead the test
Dragon Ball Z: Budokai Tenkaichi 2 leans a little harder on reads, though the gap is small.
Dragon Ball Z: Budokai Tenkaichi 2
Versus friends, baiting transformations and dodges matters
Rocky
Versus boxing rewards baiting and predicting a human opponent
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 Tenkaichi 2
Full movesets are public knowledge
Rocky
Fights are mostly deterministic given inputs
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 Tenkaichi 2
A 120-character roster of matchup and item knowledge
Rocky
Training stat allocation and opponent weaknesses reward prep
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.