head to head
Neither is meaningfully harder - they pose close to the same test. The widest gap is reads, and it is a single point.

Execution · Competitive PvP
A movement-heavy battle royale shooter where squads fight for loot and zone control.

Execution · Grand Arena
Open military simulator and PvP sandbox.
Apex Legends leans Execution (Competitive PvP); Arma 3 leans Execution (Grand Arena).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Apex Legends
Movement tech and recoil control gate fights heavily.
Arma 3
Bullet drop, stance, sway, weight all matter
Arma 3 leans a little harder on reads, though the gap is small.
Apex Legends
Adaptive squads in unpredictable rotations and third-parties.
Arma 3
PvP and milsim ops reward prediction
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Apex Legends
Loot RNG and ring pulls shape every match.
Arma 3
Mission scripts and AI behavior vary
Arma 3 leans a little harder on optimization, though the gap is small.
Apex Legends
Legend synergy, rotations, and inventory routing matter.
Arma 3
Loadout planning and tactics solvable
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.