head to head
Super Smash Bros. Melee asks more than Street Fighter II' Turbo, and the gap is execution.

Execution · Competitive PvP
The foundational test of fighting-game execution and human prediction at speed.

Execution · Competitive PvP
A platform fighter with one of the highest execution ceilings in any competitive game, layered on top of deep human reads.
Street Fighter II' Turbo leans Execution (Competitive PvP); Super Smash Bros. Melee leans Execution (Competitive PvP).
Super Smash Bros. Melee leans clearly harder on execution.
Street Fighter II' Turbo
Charge timing and anti-air reactions at turbo speed
Super Smash Bros. Melee
Wavedashing, L-cancels, and tech-chasing set an extreme physical ceiling
Super Smash Bros. Melee leans a little harder on reads, though the gap is small.
Street Fighter II' Turbo
Fireball-trap mind games against an adapting human are the essence
Super Smash Bros. Melee
Reading DI choices and opponent adaptive habits is constant and non-convergent
Super Smash Bros. Melee leans clearly harder on variance.
Street Fighter II' Turbo
Twelve public movesets, nothing hidden
Super Smash Bros. Melee
Stage hazard RNG and spawn positions add marginal chaos
Super Smash Bros. Melee leans a little harder on optimization, though the gap is small.
Street Fighter II' Turbo
Matchup theory and spacing fundamentals were codified here
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.