head to head
Super Smash Bros. Melee asks more than Pro Evolution Soccer 2015, and the gap is execution.

Execution · Competitive PvP
Stick precision and constant prediction of a human opponent's tactical habits.

Execution · Competitive PvP
A platform fighter with one of the highest execution ceilings in any competitive game, layered on top of deep human reads.
Pro Evolution Soccer 2015 leans Execution (Competitive PvP); Super Smash Bros. Melee leans Execution (Competitive PvP).
Super Smash Bros. Melee leans clearly harder on execution.
Pro Evolution Soccer 2015
First touch, through-ball timing and finishing demand precise sticks
Super Smash Bros. Melee
Wavedashing, L-cancels, and tech-chasing set an extreme physical ceiling
Super Smash Bros. Melee leans clearly harder on reads.
Pro Evolution Soccer 2015
Human opponents bait, switch tactics and punish habits
Super Smash Bros. Melee
Reading DI choices and opponent adaptive habits is constant and non-convergent
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Pro Evolution Soccer 2015
Deflections and referee calls add bounded chaos
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.
Pro Evolution Soccer 2015
Formations, player roles and set pieces 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.