head to head
Neither is harder. They score identically on all four axes, so the difference between them is in kind, not degree.

Execution · Pure Mechanics
Steering a WWI biplane through fixed scrolling terrain on timing and memorised targets.

Execution · Pure Mechanics
The 70s-cinema getaway driving game with famously demanding physics.
Blue Max leans Execution (Pure Mechanics); Driver 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.
Blue Max
Altitude control, bombing timing and dodging demand steady hands
Driver
Handbrake control and pursuit driving by feel
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Blue Max
Enemy planes fly scripted patterns
Driver
Police AI is mappable
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Blue Max
Terrain layout is fixed and memorisable
Driver
Traffic adds mild unpredictability
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Blue Max
Learning target locations and fuel routes raises scores
Driver
City routes and mission tactics learnable
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.