head to head
Neither is simply harder - they are hard in different places. Agar.io demands more execution; Just Act Natural demands more reads.

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

Reads · Pure Mind Games
Behavioural bluffing - mimicking NPCs while human seekers learn your tells.
Agar.io leans Reads (Competitive PvP); Just Act Natural leans Reads (Pure Mind Games).
Agar.io leans clearly harder on execution.
Agar.io
Mouse steering and split timing
Just Act Natural
Walking like an NPC needs restraint, not dexterity
Just Act Natural leans clearly harder on reads.
Agar.io
Baiting and predicting human blobs decides fights
Just Act Natural
Out-guessing human seekers and hiders is the whole game
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
Just Act Natural
NPC crowds and tasks add cover noise
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Agar.io
Split-merge math is shallow but real
Just Act Natural
Task patterns can be learned but humans counter-adapt
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.