head to head
Neither is simply harder - they are hard in different places. Arma 3 demands more execution; Dark and Darker demands more variance.

Execution · Grand Arena
Open military simulator and PvP sandbox.

Reads · Grand Arena
Tests slow-melee dueling and predicting human extraction squads under loot RNG.
Arma 3 leans Execution (Grand Arena); Dark and Darker leans Reads (Grand Arena).
Arma 3 leans clearly harder on execution.
Arma 3
Bullet drop, stance, sway, weight all matter
Dark and Darker
Slow melee timing, spacing and spell aim decide fights
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Arma 3
PvP and milsim ops reward prediction
Dark and Darker
Third-partying, baiting and outplaying human squads is central
Dark and Darker leans clearly harder on variance.
Arma 3
Mission scripts and AI behavior vary
Dark and Darker
Loot rolls, spawns and circle placement shape every raid
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Arma 3
Loadout planning and tactics solvable
Dark and Darker
Gear economy, class builds and dungeon routes reward grinding knowledge
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.