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 touch, human prediction and weapon economy in destructible 3D terrain.
Arma 2 leans Execution (Competitive PvP); Worms 3D 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 3D
Judging grenade arcs and wind in 3D takes real touch
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 3D
Predicting where a human hides and strikes next matters
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 3D
Wind, crate drops and terrain chaos swing turns
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 3D
Weapon economy and positioning math 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.