head to head
Neither is simply harder - they are hard in different places. Arma 2 demands more execution; Just Act Natural demands more reads.

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

Reads · Pure Mind Games
Behavioural bluffing - mimicking NPCs while human seekers learn your tells.
Arma 2 leans Execution (Competitive PvP); Just Act Natural leans Reads (Pure Mind Games).
Arma 2 leans clearly harder on execution.
Arma 2
Ballistics, stance, and positioning over twitch aim
Just Act Natural
Walking like an NPC needs restraint, not dexterity
Just Act Natural leans clearly harder on reads.
Arma 2
Human squads in PvP scenarios adapt
Just Act Natural
Out-guessing human seekers and hiders is the whole game
Arma 2 leans a little harder on variance, though the gap is small.
Arma 2
Vast terrain hides enemy positions
Just Act Natural
NPC crowds and tasks add cover noise
Arma 2 leans clearly harder on optimization.
Arma 2
Doctrine, loadouts, and mission planning
Just Act Natural
Task patterns can be learned but humans counter-adapt
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.