head to head
Splatter: Zombiecalypse Now asks more than Grand Theft Auto V, and the gap is execution.

Execution · Practiced Mastery
Sandbox crime playground spanning shooting, driving, and a persistent online economy.

Execution · Practiced Mastery
A top-down shooter testing twin-stick aim and crowd management against zombie waves.
Grand Theft Auto V leans Execution (Practiced Mastery); Splatter: Zombiecalypse Now leans Execution (Practiced Mastery).
Splatter: Zombiecalypse Now leans clearly harder on execution.
Grand Theft Auto V
Driving and shooting demand decent inputs.
Splatter: Zombiecalypse Now
Twin-stick aiming and dodging carry every firefight
Grand Theft Auto V leans a little harder on reads, though the gap is small.
Grand Theft Auto V
Online PvP exists but mostly gear/positioning, not modeling.
Splatter: Zombiecalypse Now
Zombies swarm on scripted AI, not adaptive prediction
Splatter: Zombiecalypse Now leans clearly harder on variance.
Grand Theft Auto V
Some mission and lobby randomness.
Splatter: Zombiecalypse Now
Enemy spawns and item drops add run-to-run chaos
Splatter: Zombiecalypse Now leans a little harder on optimization, though the gap is small.
Grand Theft Auto V
Heists, money loops, builds learnable.
Splatter: Zombiecalypse Now
Weapon upgrades and positioning reward 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.