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 single-marque racer tracing Porsche's history with unusually demanding handling for its series.

Execution · Practiced Mastery
Track memorisation and upgrade economy layered under straightforward racing execution.
Need for Speed: Porsche Unleashed leans Execution (Practiced Mastery); Top Gear 2 leans Execution (Practiced Mastery).
Need for Speed: Porsche Unleashed leans a little harder on execution, though the gap is small.
Need for Speed: Porsche Unleashed
Weighty handling model punishes sloppy inputs.
Top Gear 2
Clean cornering and nitro timing decide finishing position
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Need for Speed: Porsche Unleashed
AI racers run fixed lines.
Top Gear 2
AI racers follow fixed rubber-band behaviour
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Need for Speed: Porsche Unleashed
Fixed point-to-point courses; little hidden.
Top Gear 2
Tracks and hazards are identical every championship
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Need for Speed: Porsche Unleashed
Career car trading and upgrade economy reward planning.
Top Gear 2
Upgrade purchase order and track memorisation compound advantages
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.