head to head
Gran Turismo 7 asks more than Grand Theft Auto V, and the gap is optimization.

Execution · Practiced Mastery
A simulation racer where tuning and clean laps dominate the podium.

Execution · Practiced Mastery
Sandbox crime playground spanning shooting, driving, and a persistent online economy.
Gran Turismo 7 leans Execution (Practiced Mastery); Grand Theft Auto V leans Execution (Practiced Mastery).
Gran Turismo 7 leans clearly harder on execution.
Gran Turismo 7
Braking points and throttle modulation define lap times.
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.
Gran Turismo 7
AI is scripted; online drivers offer minor adaptation.
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.
Gran Turismo 7
Tire wear and weather add modest randomness.
Grand Theft Auto V
Some mission and lobby randomness.
Gran Turismo 7 leans clearly harder on optimization.
Gran Turismo 7
Car setup, tuning, and pit strategy heavily decisive.
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.