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 · Practiced Mastery
Open-world driving that tests car control with a tuning layer underneath.

Execution · Pure Mechanics
Retro arcade racer channeling Top Gear's pure lane-weaving speed.
Forza Horizon leans Execution (Practiced Mastery); Horizon Chase Turbo 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.
Forza Horizon
Driving skill with assists off carries every event
Horizon Chase Turbo
Weaving through traffic and nailing fuel pickups
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Forza Horizon
AI drivatars follow patterns; casual online adds little
Horizon Chase Turbo
Rival cars run fixed rubber-band logic
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Forza Horizon
The open world is fixed and fully discoverable
Horizon Chase Turbo
Minimal randomness in track layouts
Forza Horizon leans a little harder on optimization, though the gap is small.
Forza Horizon
Car tuning and racing lines reward systematic study
Horizon Chase Turbo
Car stats and lap memorization help
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.