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
Open-world driving that tests car control with a tuning layer underneath.

Execution · Practiced Mastery
A stealth-action adventure testing cover shooting and memorised patrol routes.
Forza Horizon leans Execution (Practiced Mastery); Headhunter leans Execution (Practiced Mastery).
Forza Horizon leans a little harder on execution, though the gap is small.
Forza Horizon
Driving skill with assists off carries every event
Headhunter
Cover shooting and bike license tests demand steady hands
Forza Horizon leans a little harder on reads, though the gap is small.
Forza Horizon
AI drivatars follow patterns; casual online adds little
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.
Forza Horizon
The open world is fixed and fully discoverable
Headhunter
Level layouts hold few surprises after one pass
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Forza Horizon
Car tuning and racing lines reward systematic study
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.