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.

Optimization · Practiced Mastery
A blocky free-to-play zombie survival sandbox mixing scavenging, basebuilding, and PvP.
Arma 2 leans Execution (Competitive PvP); Unturned leans Optimization (Practiced Mastery).
Arma 2 leans a little harder on execution, though the gap is small.
Arma 2
Ballistics, stance, and positioning over twitch aim
Unturned
Gunfights and driving reward aim and control
Arma 2 leans a little harder on reads, though the gap is small.
Arma 2
Human squads in PvP scenarios adapt
Unturned
Human raiders and ambushes on PvP servers
Unturned leans a little harder on variance, though the gap is small.
Arma 2
Vast terrain hides enemy positions
Unturned
Loot spawns and unknown player positions
Unturned leans a little harder on optimization, though the gap is small.
Arma 2
Doctrine, loadouts, and mission planning
Unturned
Base building, loot routes, and crafting economy
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.