head to head
Neither is meaningfully harder - they pose close to the same test. The widest gap is variance, 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
Cornering execution over memorisable circuits, with light prediction in wheel-to-wheel multiplayer.
Forza Horizon 3 leans Execution (Practiced Mastery); Grid 2 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.
Forza Horizon 3
Car control and racing lines at speed
Grid 2
Car control through corners is the entire moment-to-moment test
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
Grid 2
Online wheel-to-wheel adds light positional prediction
Forza Horizon 3 leans a little harder on variance, though the gap is small.
Forza Horizon 3
Minor traffic and event variation
Grid 2
Tracks are fixed and fully visible
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
Grid 2
Racing lines, braking points and car selection are studyable
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.