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
Wrangling high-speed 3D movement through fixed stages and boss scripts.
Need for Speed: Porsche Unleashed leans Execution (Practiced Mastery); Sonic Adventure DX: Director's Cut 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.
Sonic Adventure DX: Director's Cut
High-speed 3D control and jank-wrangling demand real hands
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.
Sonic Adventure DX: Director's Cut
Chaos bosses run fixed phase scripts
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.
Sonic Adventure DX: Director's Cut
Stage layouts and upgrades never change
Need for Speed: Porsche Unleashed leans a little harder on optimization, though the gap is small.
Need for Speed: Porsche Unleashed
Career car trading and upgrade economy reward planning.
Sonic Adventure DX: Director's Cut
Speedrun routing and A-rank paths 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.