head to head
Super Smash Bros. Melee asks more than Plants vs. Zombies: Battle for Neighborville, and the gap is reads.

Execution · Competitive PvP
A class-based shooter spin-off of the tower-defense series with PvP and co-op modes.

Execution · Competitive PvP
A platform fighter with one of the highest execution ceilings in any competitive game, layered on top of deep human reads.
Plants vs. Zombies: Battle for Neighborville leans Execution (Competitive PvP); Super Smash Bros. Melee leans Execution (Competitive PvP).
Super Smash Bros. Melee leans clearly harder on execution.
Plants vs. Zombies: Battle for Neighborville
aim and movement in class-based shooter combat
Super Smash Bros. Melee
Wavedashing, L-cancels, and tech-chasing set an extreme physical ceiling
Super Smash Bros. Melee leans clearly harder on reads.
Plants vs. Zombies: Battle for Neighborville
predicting human opponents' pushes and flanks
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.
Plants vs. Zombies: Battle for Neighborville
minor loot and spawn randomness
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.
Plants vs. Zombies: Battle for Neighborville
class builds and lane strategy are solvable
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.