head to head
Perfect Dark 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
N64 spy FPS famed for gadget-heavy missions and bot-filled multiplayer.
Grand Theft Auto V leans Execution (Practiced Mastery); Perfect Dark leans Execution (Practiced Mastery).
Perfect Dark leans clearly harder on execution.
Grand Theft Auto V
Driving and shooting demand decent inputs.
Perfect Dark
N64 manual aim and tight mission play
Perfect Dark leans a little harder on reads, though the gap is small.
Grand Theft Auto V
Online PvP exists but mostly gear/positioning, not modeling.
Perfect Dark
Multiplayer and clever sims add some human-style adaptation
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Grand Theft Auto V
Some mission and lobby randomness.
Perfect Dark
Mission scripting fixed once learned
Perfect Dark leans a little harder on optimization, though the gap is small.
Grand Theft Auto V
Heists, money loops, builds learnable.
Perfect Dark
Objective routing on harder difficulty tiers
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.