head to head
Super Smash Bros. Brawl asks more than Worms Rumble, 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
Real-time arena aim duels against human worms with randomised weapon pickups.
Super Smash Bros. Brawl leans Reads (Competitive PvP); Worms Rumble leans Execution (Competitive PvP).
Worms Rumble leans a little harder on execution, though the gap is small.
Super Smash Bros. Brawl
Slower engine lowers the ceiling but spacing still needs hands.
Worms Rumble
Real-time aim and movement decide brawls, unlike turn-based Worms
Super Smash Bros. Brawl leans clearly harder on reads.
Super Smash Bros. Brawl
Defensive bait-and-punish yomi dominates its floaty neutral.
Worms Rumble
Human opponents in arena and royale modes can be predicted
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Super Smash Bros. Brawl
Random tripping injects genuine uncontrollable RNG into movement.
Worms Rumble
Weapon crate spawns and drop positions add randomness
Super Smash Bros. Brawl 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 Rumble
Loadout knowledge and map control matter but stay shallow
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.