head to head
Super Smash Bros. Melee asks more than FIFA 06: Road to FIFA World Cup, and the gap is execution.

Execution · Competitive PvP
A soccer simulation testing ball-control execution and reading human opponents.

Execution · Competitive PvP
A platform fighter with one of the highest execution ceilings in any competitive game, layered on top of deep human reads.
FIFA 06: Road to FIFA World Cup leans Execution (Competitive PvP); Super Smash Bros. Melee leans Execution (Competitive PvP).
Super Smash Bros. Melee leans clearly harder on execution.
FIFA 06: Road to FIFA World Cup
Passing, shooting and movement timing decide matches
Super Smash Bros. Melee
Wavedashing, L-cancels, and tech-chasing set an extreme physical ceiling
Super Smash Bros. Melee leans clearly harder on reads.
FIFA 06: Road to FIFA World Cup
Human opponents can be read; AI is scripted
Super Smash Bros. Melee
Reading DI choices and opponent adaptive habits is constant and non-convergent
FIFA 06: Road to FIFA World Cup leans a little harder on variance, though the gap is small.
FIFA 06: Road to FIFA World Cup
Some randomness in ball physics and outcomes
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.
FIFA 06: Road to FIFA World Cup
Formations, tactics and player management matter
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.