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 · Practiced Mastery
A stealth-action adventure testing cover shooting and memorised patrol routes.
Driver leans Execution (Pure Mechanics); Headhunter leans Execution (Practiced Mastery).
Driver leans a little harder on execution, though the gap is small.
Driver
Handbrake control and pursuit driving by feel
Headhunter
Cover shooting and bike license tests demand steady hands
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
Headhunter
Enemy guards run fixed patrol scripts
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
Headhunter
Level layouts hold few surprises after one pass
Headhunter leans a little harder on optimization, though the gap is small.
Driver
City routes and mission tactics learnable
Headhunter
Learning patrols, routes and LEILA trials carries progress
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.