head to head
Super Smash Bros. Melee asks more than FIFA 17, and the gap is execution.

Execution · Competitive PvP
Mechanical football skill plus constant prediction of a human opponent's tendencies.

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 17 leans Execution (Competitive PvP); Super Smash Bros. Melee leans Execution (Competitive PvP).
Super Smash Bros. Melee leans clearly harder on execution.
FIFA 17
Dribbling, shooting and defending inputs decide individual duels
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 17
Human opponents online keep shifting attacking and defending habits
Super Smash Bros. Melee
Reading DI choices and opponent adaptive habits is constant and non-convergent
FIFA 17 leans a little harder on variance, though the gap is small.
FIFA 17
Bounces, deflections and finishing RNG swing tight matches
Super Smash Bros. Melee
Stage hazard RNG and spawn positions add marginal chaos
Super Smash Bros. Melee leans clearly harder on optimization.
FIFA 17
Squad chemistry, formations and meta mechanics are studied layers
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.