head to head
Neither is simply harder - they are hard in different places. Crash Bash demands more variance; Super Smash Bros. Melee demands more reads.

Execution · Competitive PvP
A Crash Bandicoot party collection of competitive arena minigames for up to four players.

Execution · Competitive PvP
A platform fighter with one of the highest execution ceilings in any competitive game, layered on top of deep human reads.
Crash Bash leans Execution (Competitive PvP); Super Smash Bros. Melee leans Execution (Competitive PvP).
Super Smash Bros. Melee leans clearly harder on execution.
Crash Bash
Minigame timing, mashing, and dodging decide most rounds
Super Smash Bros. Melee
Wavedashing, L-cancels, and tech-chasing set an extreme physical ceiling
Super Smash Bros. Melee leans clearly harder on reads.
Crash Bash
Human rivals in versus minigames can be baited
Super Smash Bros. Melee
Reading DI choices and opponent adaptive habits is constant and non-convergent
Crash Bash leans clearly harder on variance.
Crash Bash
Item drops and arena randomness swing rounds
Super Smash Bros. Melee
Stage hazard RNG and spawn positions add marginal chaos
Super Smash Bros. Melee leans clearly harder on optimization.
Crash Bash
Light minigame strategies, quickly learned
Super Smash Bros. Melee
Character matchup tiers and optimal movement routing are deeply studied
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.