head to head
Neither is meaningfully harder - they pose close to the same test. The widest gap is reads, and it is a single point.

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

Execution · Pure Mechanics
Open-world racing testing car control and line discipline with light tuning underneath.
Driver leans Execution (Pure Mechanics); Forza Horizon 2 leans Execution (Pure Mechanics).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Driver
Handbrake control and pursuit driving by feel
Forza Horizon 2
Racing lines, braking points and car control lead everything
Forza Horizon 2 leans a little harder on reads, though the gap is small.
Driver
Police AI is mappable
Forza Horizon 2
Drivatar AI mimics styles but stays effectively scripted
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
Forza Horizon 2
Weather shifts grip slightly; courses are fully known
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
Forza Horizon 2
Car tuning and route knowledge reward preparation
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.