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

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

Execution · Pure Mechanics
High-speed trick execution along optimised lines down fixed mountains.
Forza Horizon leans Execution (Practiced Mastery); SSX leans Execution (Pure Mechanics).
SSX leans a little harder on execution, though the gap is small.
Forza Horizon
Driving skill with assists off carries every event
SSX
Trick timing, landings and line control at speed are everything
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
SSX
Rival AI racers are aggressive but mappable
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
SSX
Courses are fixed once learned
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Forza Horizon
Car tuning and racing lines reward systematic study
SSX
Optimal trick lines and shortcut routing maximise score
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.