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
Retro arcade racer channeling Top Gear's pure lane-weaving speed.

Execution · Practiced Mastery
Hoverboard racing built on trick timing and learned gravity-shortcut routes.
Horizon Chase Turbo 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.
Horizon Chase Turbo
Weaving through traffic and nailing fuel pickups
Sonic Riders: Zero Gravity
Trick timing and gravity maneuvers demand constant precise inputs
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Horizon Chase Turbo
Rival cars run fixed rubber-band logic
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.
Horizon Chase Turbo
Minimal randomness in track layouts
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.
Horizon Chase Turbo
Car stats and lap memorization help
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.