head to head
Neither is meaningfully harder - they pose close to the same test. The widest gap is reads, and it is a single point.

Execution · Practiced Mastery
A grittier crime story where weighty driving and gunplay carry the experience.

Execution · Practiced Mastery
Casual time-pressure driving that rewards shortcut knowledge over precision.
Grand Theft Auto IV leans Execution (Practiced Mastery); The Simpsons: Road Rage 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 IV
Heavier driving and cover shooting reward control.
The Simpsons: Road Rage
Arcade driving against the clock needs modest car control
Grand Theft Auto IV leans a little harder on reads, though the gap is small.
Grand Theft Auto IV
Scripted AI, no adaptive opponent modeling.
The Simpsons: Road Rage
Traffic is scripted noise, not opposition
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Grand Theft Auto IV
Minor mission variance.
The Simpsons: Road Rage
Random passenger destinations vary each session
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Grand Theft Auto IV
Mission routing and weapon picks learnable.
The Simpsons: Road Rage
Learning shortcuts and city layout raises earnings
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.