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

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

Execution · Practiced Mastery
Tests reflex dodging that collapses into memorised safe spots.
Driver leans Execution (Pure Mechanics); Super Thunder Blade 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
Super Thunder Blade
Weaving the chopper through fire at speed is the whole demand
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Driver
Police AI is mappable
Super Thunder Blade
Enemy fire follows fixed patterns
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
Super Thunder Blade
Stages never change between runs
Super Thunder Blade leans a little harder on optimization, though the gap is small.
Driver
City routes and mission tactics learnable
Super Thunder Blade
Safe-spot and pattern memorisation trivialises repeat runs
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.