head to head
Escape from Tarkov asks more than Arma 3, and the gap is variance.

Execution · Grand Arena
Open military simulator and PvP sandbox.

Execution · Grand Arena
Hardcore extraction shooter with deep systems.
Arma 3 leans Execution (Grand Arena); Escape from Tarkov 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.
Arma 3
Bullet drop, stance, sway, weight all matter
Escape from Tarkov
Realistic recoil and one-tap aim brutal
Escape from Tarkov leans a little harder on reads, though the gap is small.
Arma 3
PvP and milsim ops reward prediction
Escape from Tarkov
PvP corner-fights are pure mind games
Escape from Tarkov leans clearly harder on variance.
Arma 3
Mission scripts and AI behavior vary
Escape from Tarkov
Loot, spawns, scavs randomize raids
Escape from Tarkov leans clearly harder on optimization.
Arma 3
Loadout planning and tactics solvable
Escape from Tarkov
Ammo charts, builds, hideout deeply solved
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.