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
An open-world arcade racer across Australia where car control and tuning carry every event.

Execution · Practiced Mastery
A one-button Kirby racer whose chaotic City Trial mode became a cult multiplayer favourite.
Forza Horizon 3 leans Execution (Practiced Mastery); Kirby Air Ride leans Execution (Practiced Mastery).
Forza Horizon 3 leans a little harder on execution, though the gap is small.
Forza Horizon 3
Car control and racing lines at speed
Kirby Air Ride
Charge-boost timing and machine handling
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Forza Horizon 3
Drivatars mimic but don't truly adapt
Kirby Air Ride
Local multiplayer rivals add light prediction
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Forza Horizon 3
Minor traffic and event variation
Kirby Air Ride
City Trial patch and event randomness
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Forza Horizon 3
Tuning, car choice, and route knowledge
Kirby Air Ride
Machine stats and course lines are mappable
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.