head to head
Neither is simply harder - they are hard in different places. Super Smash Bros. Melee demands more execution; Worms 2 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 comedy where teams of worms annihilate each other.
Super Smash Bros. Melee leans Execution (Competitive PvP); Worms 2 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 2
Ninja rope mastery and pixel-perfect grenade arcs win games.
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 2
Human opponents bait positions and hide intentions.
Worms 2 leans clearly harder on variance.
Super Smash Bros. Melee
Stage hazard RNG and spawn positions add marginal chaos
Worms 2
Wind, crate drops and terrain randomness swing turns.
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 2
Weapon economy and positioning theory are studyable.
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.