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
A circuit racing simulator where consistent lap-time execution and car setup decide everything.

Execution · Practiced Mastery
Aggressive circuit racing testing car control over memorisable tracks and braking points.
Forza Motorsport leans Execution (Practiced Mastery); Race Driver: Grid leans Execution (Practiced Mastery).
Forza Motorsport leans a little harder on execution, though the gap is small.
Forza Motorsport
Lap-time precision: braking points, apexes, throttle discipline
Race Driver: Grid
Aggressive wheel-to-wheel car control is the core demand
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Forza Motorsport
Racecraft against humans matters but is secondary
Race Driver: Grid
Online racing adds light opponent positioning awareness
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Forza Motorsport
Little randomness beyond grid position
Race Driver: Grid
Damage outcomes add slight unpredictability to contact
Forza Motorsport leans a little harder on optimization, though the gap is small.
Forza Motorsport
Setup tuning and tire/fuel strategy are deeply solvable
Race Driver: Grid
Braking points, lines and flashback management are learnable
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.