head to head
Grand Theft Auto V asks more than Grand Theft Auto, and the gap is reads.

Execution · Practiced Mastery
The original top-down crime sandbox where you rack up points causing mayhem across three cities.

Execution · Practiced Mastery
Sandbox crime playground spanning shooting, driving, and a persistent online economy.
Grand Theft Auto leans Execution (Practiced Mastery); Grand Theft Auto V leans Execution (Practiced Mastery).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Grand Theft Auto
Twitchy top-down driving and shooting under police pressure
Grand Theft Auto V
Driving and shooting demand decent inputs.
Grand Theft Auto V leans clearly harder on reads.
Grand Theft Auto
Cops follow simple scripts; nothing adapts
Grand Theft Auto V
Online PvP exists but mostly gear/positioning, not modeling.
Grand Theft Auto leans a little harder on variance, though the gap is small.
Grand Theft Auto
Chaotic traffic and wanted-level escalation surprise players
Grand Theft Auto V
Some mission and lobby randomness.
Grand Theft Auto leans a little harder on optimization, though the gap is small.
Grand Theft Auto
Score targets reward learning missions and city layouts
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.