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
An open-world cop action game mixing driving, gunplay, and martial arts across a mapped Los Angeles.
Grand Theft Auto IV leans Execution (Practiced Mastery); True Crime: Streets of LA 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.
True Crime: Streets of LA
Driving, shooting, and brawling reflexes
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.
True Crime: Streets of LA
AI cops and crooks are scripted
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.
True Crime: Streets of LA
Random street crimes pop up
True Crime: Streets of LA leans a little harder on optimization, though the gap is small.
Grand Theft Auto IV
Mission routing and weapon picks learnable.
True Crime: Streets of LA
Branching missions and upgrade routes 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.