head to head
Super Smash Bros. Melee asks more than One Piece: Burning Blood, and the gap is execution.

Execution · Competitive PvP
An anime arena fighter testing team-switch timing and counter prediction against humans.

Execution · Competitive PvP
A platform fighter with one of the highest execution ceilings in any competitive game, layered on top of deep human reads.
One Piece: Burning Blood leans Execution (Competitive PvP); Super Smash Bros. Melee leans Execution (Competitive PvP).
Super Smash Bros. Melee leans clearly harder on execution.
One Piece: Burning Blood
Combo timing and guard breaks need moderate hands
Super Smash Bros. Melee
Wavedashing, L-cancels, and tech-chasing set an extreme physical ceiling
Super Smash Bros. Melee leans clearly harder on reads.
One Piece: Burning Blood
Human opponents bait switches and counters constantly
Super Smash Bros. Melee
Reading DI choices and opponent adaptive habits is constant and non-convergent
Super Smash Bros. Melee leans a little harder on variance, though the gap is small.
One Piece: Burning Blood
Full-information arena with no hidden state
Super Smash Bros. Melee
Stage hazard RNG and spawn positions add marginal chaos
Super Smash Bros. Melee leans clearly harder on optimization.
One Piece: Burning Blood
Team composition and Devil Fruit matchups reward study
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.