head to head
Super Smash Bros. Melee asks more than World Soccer: Winning Eleven 9, and the gap is execution.

Execution · Competitive PvP
A platform fighter with one of the highest execution ceilings in any competitive game, layered on top of deep human reads.

Execution · Competitive PvP
A football sim testing stick control plus constant prediction of a human opponent's tactics.
Super Smash Bros. Melee leans Execution (Competitive PvP); World Soccer: Winning Eleven 9 leans Execution (Competitive PvP).
Super Smash Bros. Melee leans clearly harder on execution.
Super Smash Bros. Melee
Wavedashing, L-cancels, and tech-chasing set an extreme physical ceiling
World Soccer: Winning Eleven 9
First-touch timing, dribbling and shot placement decide matches
Super Smash Bros. Melee leans clearly harder on reads.
Super Smash Bros. Melee
Reading DI choices and opponent adaptive habits is constant and non-convergent
World Soccer: Winning Eleven 9
Human opponents feint, vary tactics and punish habits
World Soccer: Winning Eleven 9 leans a little harder on variance, though the gap is small.
Super Smash Bros. Melee
Stage hazard RNG and spawn positions add marginal chaos
World Soccer: Winning Eleven 9
Deflections and referee calls add bounded chaos
Super Smash Bros. Melee leans a little harder on optimization, though the gap is small.
Super Smash Bros. Melee
Character matchup tiers and optimal movement routing are deeply studied
World Soccer: Winning Eleven 9
Formations, player roles and set pieces reward study
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.