head to head
Neither is simply harder - they are hard in different places. Stalcraft: X demands more variance; Super Smash Bros. Melee demands more reads.

Execution · Competitive PvP
Open-zone gunfights where aim, ambush prediction and gear economy all matter.

Execution · Competitive PvP
A platform fighter with one of the highest execution ceilings in any competitive game, layered on top of deep human reads.
Stalcraft: X leans Execution (Competitive PvP); Super Smash Bros. Melee leans Execution (Competitive PvP).
Super Smash Bros. Melee leans clearly harder on execution.
Stalcraft: X
Gunfights against other stalkers reward raw aim and movement
Super Smash Bros. Melee
Wavedashing, L-cancels, and tech-chasing set an extreme physical ceiling
Super Smash Bros. Melee leans clearly harder on reads.
Stalcraft: X
Open-zone PvP means predicting ambushes from adapting humans
Super Smash Bros. Melee
Reading DI choices and opponent adaptive habits is constant and non-convergent
Stalcraft: X leans clearly harder on variance.
Stalcraft: X
Anomalies, artifact spawns and who you meet inject 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.
Stalcraft: X
Gear economy, artifact builds and route knowledge compound
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.