head to head
Arma 2 asks more than Agar.io, and the gap is execution.

Reads · Competitive PvP
A browser arena where your cell eats smaller players and flees bigger ones.

Execution · Competitive PvP
A sprawling military simulator where realistic ballistics and planning beat reflexes.
Agar.io leans Reads (Competitive PvP); Arma 2 leans Execution (Competitive PvP).
Arma 2 leans clearly harder on execution.
Agar.io
Mouse steering and split timing
Arma 2
Ballistics, stance, and positioning over twitch aim
Agar.io leans a little harder on reads, though the gap is small.
Agar.io
Baiting and predicting human blobs decides fights
Arma 2
Human squads in PvP scenarios adapt
Arma 2 leans a little harder on variance, though the gap is small.
Agar.io
Spawn locations and lobby makeup random
Arma 2
Vast terrain hides enemy positions
Arma 2 leans clearly harder on optimization.
Agar.io
Split-merge math is shallow but real
Arma 2
Doctrine, loadouts, and mission planning
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.