head to head
Brawl Stars asks more than Worms Rumble, and the gap is optimization.

Execution · Competitive PvP
Supercell's snappy top-down team brawler built around three-minute objective fights.

Execution · Competitive PvP
Real-time arena aim duels against human worms with randomised weapon pickups.
Brawl Stars leans Execution (Competitive PvP); Worms Rumble leans Execution (Competitive PvP).
Worms Rumble leans a little harder on execution, though the gap is small.
Brawl Stars
Aim, dodging, and ability timing in real time
Worms Rumble
Real-time aim and movement decide brawls, unlike turn-based Worms
Brawl Stars leans a little harder on reads, though the gap is small.
Brawl Stars
Human teams rotate, bait supers, and adapt
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.
Brawl Stars
Bush ambushes and power-cube spawns hide information
Worms Rumble
Weapon crate spawns and drop positions add randomness
Brawl Stars leans clearly harder on optimization.
Brawl Stars
Brawler matchups and map strategy are learnable
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.