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

Execution · Pure Mechanics
An early arcade racer testing reaction dodges and memorised obstacle patterns against the clock.

Execution · Practiced Mastery
A single-marque racer tracing Porsche's history with unusually demanding handling for its series.
Antarctic Adventure leans Execution (Pure Mechanics); Need for Speed: Porsche Unleashed 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.
Antarctic Adventure
Dodging crevasses and seals at speed is the entire game
Need for Speed: Porsche Unleashed
Weighty handling model punishes sloppy inputs.
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Antarctic Adventure
Hazards scroll in on fixed arcade patterns
Need for Speed: Porsche Unleashed
AI racers run fixed lines.
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Antarctic Adventure
Obstacle layouts repeat and are quickly memorised
Need for Speed: Porsche Unleashed
Fixed point-to-point courses; little hidden.
Need for Speed: Porsche Unleashed leans a little harder on optimization, though the gap is small.
Antarctic Adventure
Learning hazard patterns and speed management raises scores
Need for Speed: Porsche Unleashed
Career car trading and upgrade economy reward planning.
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.