head to head
Super Smash Bros. Melee asks more than Counter-Strike: Source, and the gap is reads.

Execution · Competitive PvP
The Source-engine era of Counter-Strike's aim-and-economy tactical formula.

Execution · Competitive PvP
A platform fighter with one of the highest execution ceilings in any competitive game, layered on top of deep human reads.
Counter-Strike: Source leans Execution (Competitive PvP); Super Smash Bros. Melee leans Execution (Competitive PvP).
Super Smash Bros. Melee leans a little harder on execution, though the gap is small.
Counter-Strike: Source
Recoil control and crosshair placement decide 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.
Counter-Strike: Source
Outguessing rotations, fakes, and timing of human opponents
Super Smash Bros. Melee
Reading DI choices and opponent adaptive habits is constant and non-convergent
Counter-Strike: Source leans a little harder on variance, though the gap is small.
Counter-Strike: Source
Hidden enemy positions until information is gathered
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.
Counter-Strike: Source
Economy rounds, utility lineups, and map control theory
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.