head to head
Super Smash Bros. Brawl asks more than Dragon Ball Z: Budokai Tenkaichi 3, and the gap is variance.

Execution · Competitive PvP
Fast arena-fighter execution plus guessing games against a human opponent.

Reads · Competitive PvP
The Wii entry whose slower pace and infamous random tripping pushed Smash toward defensive mind games.
Dragon Ball Z: Budokai Tenkaichi 3 leans Execution (Competitive PvP); Super Smash Bros. Brawl leans Reads (Competitive PvP).
Dragon Ball Z: Budokai Tenkaichi 3 leans a little harder on execution, though the gap is small.
Dragon Ball Z: Budokai Tenkaichi 3
Combo timing, dashes and beam clashes demand fast hands
Super Smash Bros. Brawl
Slower engine lowers the ceiling but spacing still needs hands.
Super Smash Bros. Brawl leans a little harder on reads, though the gap is small.
Dragon Ball Z: Budokai Tenkaichi 3
Versus humans, baiting counters and vanish wars is prediction
Super Smash Bros. Brawl
Defensive bait-and-punish yomi dominates its floaty neutral.
Super Smash Bros. Brawl leans clearly harder on variance.
Dragon Ball Z: Budokai Tenkaichi 3
Almost nothing hidden once both rosters are known
Super Smash Bros. Brawl
Random tripping injects genuine uncontrollable RNG into movement.
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 3
Character tiers and combo routes form a learnable layer
Super Smash Bros. Brawl
Matchup knowledge and ledge play reward study within a campy meta.
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.