head to head
Counter-Strike: Global Offensive 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
Definitive competitive tactical FPS balancing aim mastery with team strategy.
Agar.io leans Reads (Competitive PvP); Counter-Strike: Global Offensive leans Execution (Competitive PvP).
Counter-Strike: Global Offensive leans clearly harder on execution.
Agar.io
Mouse steering and split timing
Counter-Strike: Global Offensive
Spray control and flick precision at the top
Counter-Strike: Global Offensive leans a little harder on reads, though the gap is small.
Agar.io
Baiting and predicting human blobs decides fights
Counter-Strike: Global Offensive
Anti-stratting and mid-round adaptation
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Agar.io
Spawn locations and lobby makeup random
Counter-Strike: Global Offensive
Information hidden until contact
Counter-Strike: Global Offensive leans clearly harder on optimization.
Agar.io
Split-merge math is shallow but real
Counter-Strike: Global Offensive
Utility lineups, economy, and default strats
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.