head to head
Assetto Corsa asks more than Grand Theft Auto V, and the gap is execution.

Execution · Practiced Mastery
Hardcore racing sim where execution is everything.

Execution · Practiced Mastery
Sandbox crime playground spanning shooting, driving, and a persistent online economy.
Assetto Corsa leans Execution (Practiced Mastery); Grand Theft Auto V leans Execution (Practiced Mastery).
Assetto Corsa leans clearly harder on execution.
Assetto Corsa
Demanding wheel control, braking, throttle precision
Grand Theft Auto V
Driving and shooting demand decent inputs.
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Assetto Corsa
Light online wheel-to-wheel reads
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.
Assetto Corsa
Tire and track temp variance
Grand Theft Auto V
Some mission and lobby randomness.
Assetto Corsa leans clearly harder on optimization.
Assetto Corsa
Setup tuning, car-track combo mastery
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.