head to head
Neither is harder. They score identically on all four axes, so the difference between them is in kind, not degree.

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

Execution · Competitive PvP
Tests trajectory aim and turn planning against human targets amid crate luck.
Arma 2 leans Execution (Competitive PvP); Worms: Ultimate Mayhem 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.
Arma 2
Ballistics, stance, and positioning over twitch aim
Worms: Ultimate Mayhem
3D grenade arcs and ninja-rope control reward practiced aim
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: Ultimate Mayhem
Predicting a human's target priorities shapes 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: Ultimate Mayhem
Crate drops, wind and terrain chaos swing rounds
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: Ultimate Mayhem
Weapon economy and positioning are plannable each turn
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.