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
Tests off-road handling and freeform route choice across an enormous open map.
Driver leans Execution (Pure Mechanics); Fuel 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
Fuel
Off-road vehicle control through weather events is the core test
Fuel leans a little harder on reads, though the gap is small.
Driver
Police AI is mappable
Fuel
AI racers rubber-band on scripts; online is thin
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
Fuel
The huge map is scripted-but-unknown until explored
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
Fuel
Route choice across open terrain rewards planning
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.