head to head
Neither is simply harder - they are hard in different places. Super Smash Bros. Melee demands more execution; Worms World Party demands more variance.

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
Turn-based artillery duels testing shot judgement, opponent prediction, and weapon economy under wind.
Super Smash Bros. Melee leans Execution (Competitive PvP); Worms World Party 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
Worms World Party
Precise angle and power judgement on every shot matters
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
Worms World Party
Human opponents reposition and bait - predicting them wins games
Worms World Party leans clearly harder on variance.
Super Smash Bros. Melee
Stage hazard RNG and spawn positions add marginal chaos
Worms World Party
Wind, crate drops and terrain destruction add real 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
Worms World Party
Weapon selection, positioning and turn economy reward planning
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.