head to head
Dead Space (2008) asks more than Grand Theft Auto V, and the gap is execution.

Execution · Practiced Mastery
Strategic dismemberment under resource pressure, solved by upgrade planning and practiced limb-aiming.

Execution · Practiced Mastery
Sandbox crime playground spanning shooting, driving, and a persistent online economy.
Dead Space (2008) leans Execution (Practiced Mastery); Grand Theft Auto V leans Execution (Practiced Mastery).
Dead Space (2008) leans clearly harder on execution.
Dead Space (2008)
Precise limb-targeting under Necromorph pressure is the core skill
Grand Theft Auto V
Driving and shooting demand decent inputs.
Grand Theft Auto V leans a little harder on reads, though the gap is small.
Dead Space (2008)
Necromorphs follow fixed approach patterns, not player modelling
Grand Theft Auto V
Online PvP exists but mostly gear/positioning, not modeling.
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Dead Space (2008)
Store stock is deterministic; minor drop variance on kills
Grand Theft Auto V
Some mission and lobby randomness.
Dead Space (2008) leans clearly harder on optimization.
Dead Space (2008)
Weapon upgrading, power-node routing and stasis timing are optimisable
Grand Theft Auto V
Heists, money loops, builds learnable.
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.