head to head
Agar.io asks more than The Jackbox Party Pack 9, and the gap is execution.

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

Reads · Bluff & Deduction
A party-game collection built on reading friends and comedic bluffing.
Agar.io leans Reads (Competitive PvP); The Jackbox Party Pack 9 leans Reads (Bluff & Deduction).
Agar.io leans clearly harder on execution.
Agar.io
Mouse steering and split timing
The Jackbox Party Pack 9
minor typing/drawing speed in some games
Agar.io leans a little harder on reads, though the gap is small.
Agar.io
Baiting and predicting human blobs decides fights
The Jackbox Party Pack 9
reading fellow players' humor and bluffs
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
The Jackbox Party Pack 9
prompt randomness affects rounds
Agar.io leans a little harder on optimization, though the gap is small.
Agar.io
Split-merge math is shallow but real
The Jackbox Party Pack 9
minor strategic answer choices
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.