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

Execution · Practiced Mastery
A DJ-mixing game about dropping song stems on beat and satisfying crowd requests.

Optimization · Practiced Mastery
The genre-defining 3D open-world crime game set in Liberty City.
Fuser leans Execution (Practiced Mastery); Grand Theft Auto III leans Optimization (Practiced Mastery).
Fuser leans a little harder on execution, though the gap is small.
Fuser
On-beat disc drops and quick transitions
Grand Theft Auto III
Driving and clunky gunplay set a modest physical bar
Fuser leans a little harder on reads, though the gap is small.
Fuser
Crowd requests aren't adaptive opposition
Grand Theft Auto III
Enemies are scripted; nothing models the player
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Fuser
Random crowd requests shuffle priorities
Grand Theft Auto III
Pedestrian and traffic chaos lightly randomises encounters
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Fuser
Key/tempo matching and setlist planning are learnable
Grand Theft Auto III
Mission routing and city knowledge are learnable systems
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.