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 · Pure Mechanics
The 70s-cinema getaway driving game with famously demanding physics.

Execution · Pure Mechanics
The stylish PS1 arcade racer with a grand prix story and a legendary soundtrack.
Driver leans Execution (Pure Mechanics); R4: Ridge Racer Type 4 leans Execution (Pure Mechanics).
R4: Ridge Racer Type 4 leans a little harder on execution, though the gap is small.
Driver
Handbrake control and pursuit driving by feel
R4: Ridge Racer Type 4
Grip versus drift car control rewards precise corner technique
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Driver
Police AI is mappable
R4: Ridge Racer Type 4
Rival AI is scripted per race
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Driver
Traffic adds mild unpredictability
R4: Ridge Racer Type 4
Fixed tracks; car unlock tree is deterministic
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Driver
City routes and mission tactics learnable
R4: Ridge Racer Type 4
Choosing machines and mastering lines is light routing
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.