head to head
Super Smash Bros. Brawl asks more than Worms Clan Wars, and the gap is reads.

Reads · Competitive PvP
The Wii entry whose slower pace and infamous random tripping pushed Smash toward defensive mind games.

Execution · Competitive PvP
Artillery aim and turn planning against human opponents on destructible terrain.
Super Smash Bros. Brawl leans Reads (Competitive PvP); Worms Clan Wars leans Execution (Competitive PvP).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Super Smash Bros. Brawl
Slower engine lowers the ceiling but spacing still needs hands.
Worms Clan Wars
Grenade arcs and ninja-rope control decide turns
Super Smash Bros. Brawl leans clearly harder on reads.
Super Smash Bros. Brawl
Defensive bait-and-punish yomi dominates its floaty neutral.
Worms Clan Wars
Anticipating human opponents' target priorities matters in clan play
Worms Clan Wars leans a little harder on variance, though the gap is small.
Super Smash Bros. Brawl
Random tripping injects genuine uncontrollable RNG into movement.
Worms Clan Wars
Crate drops and terrain destruction add swing
Worms Clan Wars leans a little harder on optimization, though the gap is small.
Super Smash Bros. Brawl
Matchup knowledge and ledge play reward study within a campy meta.
Worms Clan Wars
Weapon economy and positioning plans reward forethought
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.