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 · Practiced Mastery
Hoverboard racing built on trick timing and learned gravity-shortcut routes.
Driver leans Execution (Pure Mechanics); Sonic Riders: Zero Gravity leans Execution (Practiced Mastery).
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
Sonic Riders: Zero Gravity
Trick timing and gravity maneuvers demand constant precise inputs
Sonic Riders: Zero Gravity leans a little harder on reads, though the gap is small.
Driver
Police AI is mappable
Sonic Riders: Zero Gravity
Versus mode adds minimal opponent prediction
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
Sonic Riders: Zero Gravity
Tracks are fixed; almost nothing hidden
Sonic Riders: Zero Gravity leans a little harder on optimization, though the gap is small.
Driver
City routes and mission tactics learnable
Sonic Riders: Zero Gravity
Gear choice and gravity-shortcut routing separate the field
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.