head to head
Murderous Pursuits asks more than Agar.io, and the gap is reads.

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

Reads · Pure Mind Games
Victorian passengers stalk assigned quarry aboard a time-travelling ship while blending in to dodge their own hunters.
Agar.io leans Reads (Competitive PvP); Murderous Pursuits leans Reads (Pure Mind Games).
Agar.io leans a little harder on execution, though the gap is small.
Agar.io
Mouse steering and split timing
Murderous Pursuits
Timing kills and escapes takes modest motor skill.
Murderous Pursuits leans clearly harder on reads.
Agar.io
Baiting and predicting human blobs decides fights
Murderous Pursuits
Blending among NPCs against humans hunting YOU is constant mind-games.
Murderous Pursuits leans clearly harder on variance.
Agar.io
Spawn locations and lobby makeup random
Murderous Pursuits
Unknown hunter identity and random weapon spawns hide threats.
Murderous Pursuits leans a little harder on optimization, though the gap is small.
Agar.io
Split-merge math is shallow but real
Murderous Pursuits
Vignette routes and scoring systems reward learned play.
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.