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

Execution · Competitive PvP
A sprawling military simulator where realistic ballistics and planning beat reflexes.

Execution · Competitive PvP
Artillery aim and turn planning against humans under wind and crate randomness.
Arma 2 leans Execution (Competitive PvP); Worms Reloaded leans Execution (Competitive PvP).
Arma 2 leans a little harder on execution, though the gap is small.
Arma 2
Ballistics, stance, and positioning over twitch aim
Worms Reloaded
Grenade arcs and ninja-rope shots demand fine aim control
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Arma 2
Human squads in PvP scenarios adapt
Worms Reloaded
Anticipating human opponents' target priorities shifts each turn
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Arma 2
Vast terrain hides enemy positions
Worms Reloaded
Random terrain, crates and wind perturb every shot
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Arma 2
Doctrine, loadouts, and mission planning
Worms Reloaded
Weapon economy and positioning theory reward planning
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.