head to head
Need for Speed: ProStreet 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
Cleaner racing lines plus car tuning across fixed circuit disciplines.
Grand Theft Auto V leans Execution (Practiced Mastery); Need for Speed: ProStreet leans Execution (Practiced Mastery).
Need for Speed: ProStreet leans clearly harder on execution.
Grand Theft Auto V
Driving and shooting demand decent inputs.
Need for Speed: ProStreet
Grip-focused handling punishes sloppy lines hard
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.
Need for Speed: ProStreet
AI grids race on scripts, nothing adapts
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.
Need for Speed: ProStreet
Damage model adds minor consequence randomness
Need for Speed: ProStreet leans a little harder on optimization, though the gap is small.
Grand Theft Auto V
Heists, money loops, builds learnable.
Need for Speed: ProStreet
Tuning setups per discipline is a real solvable layer
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.