head to head
Neither is meaningfully harder - they pose close to the same test. The widest gap is reads, and it is a single point.

Execution · Competitive PvP
Tests shot timing and faking out human defenders amid item-driven chaos.

Execution · Competitive PvP
Artillery aim and turn planning against human opponents on destructible terrain.
Mario Strikers Charged leans Execution (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.
Mario Strikers Charged
Timing tackles, charged shots and goalie deflections needs quick hands
Worms Clan Wars
Grenade arcs and ninja-rope control decide turns
Mario Strikers Charged leans a little harder on reads, though the gap is small.
Mario Strikers Charged
Versus humans, faking shots and baiting tackles drives goals
Worms Clan Wars
Anticipating human opponents' target priorities matters in clan play
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Mario Strikers Charged
Items and stage hazards inject swingy chaos into matches
Worms Clan Wars
Crate drops and terrain destruction add swing
Worms Clan Wars leans a little harder on optimization, though the gap is small.
Mario Strikers Charged
Captain abilities and team builds reward knowing the systems
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.