head to head
TOCA Race Driver 3 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 multi-discipline motorsport sim spanning touring cars, open-wheelers and trucks with aggressive grid racing.
Grand Theft Auto V leans Execution (Practiced Mastery); TOCA Race Driver 3 leans Execution (Practiced Mastery).
TOCA Race Driver 3 leans clearly harder on execution.
Grand Theft Auto V
Driving and shooting demand decent inputs.
TOCA Race Driver 3
Consistent laps and racecraft across many disciplines.
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.
TOCA Race Driver 3
AI rivals race aggressively but predictably.
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.
TOCA Race Driver 3
Pack chaos and damage create incidents.
TOCA Race Driver 3 leans clearly harder on optimization.
Grand Theft Auto V
Heists, money loops, builds learnable.
TOCA Race Driver 3
Setups, braking points and discipline-specific lines reward study.
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.