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 sprawling military simulator where realistic ballistics and planning beat reflexes.

Execution · Practiced Mastery
A rugby sim testing on-field execution and tactical play-calling.
Arma 2 leans Execution (Competitive PvP); Rugby 08 leans Execution (Practiced Mastery).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Arma 2
Ballistics, stance, and positioning over twitch aim
Rugby 08
Timing tackles, passes and kicks needs manual skill
Arma 2 leans a little harder on reads, though the gap is small.
Arma 2
Human squads in PvP scenarios adapt
Rugby 08
Human opponents bluff plays; AI is scripted
Arma 2 leans a little harder on variance, though the gap is small.
Arma 2
Vast terrain hides enemy positions
Rugby 08
Some randomness in tackle and bounce outcomes
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Arma 2
Doctrine, loadouts, and mission planning
Rugby 08
Play calling and team tactics are a learnable layer
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.