head to head
Live for Speed asks more than Race Driver: Grid, and the gap is execution.

Execution · Pure Mechanics
A long-running hardcore racing simulator prized for its tire physics and online racing.

Execution · Practiced Mastery
Aggressive circuit racing testing car control over memorisable tracks and braking points.
Live for Speed leans Execution (Pure Mechanics); Race Driver: Grid leans Execution (Practiced Mastery).
Live for Speed leans clearly harder on execution.
Live for Speed
Hardcore sim handling rewards perfect car control
Race Driver: Grid
Aggressive wheel-to-wheel car control is the core demand
Live for Speed leans a little harder on reads, though the gap is small.
Live for Speed
Online racecraft against human rivals
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.
Live for Speed
Deterministic physics, no weather lottery
Race Driver: Grid
Damage outcomes add slight unpredictability to contact
Live for Speed leans a little harder on optimization, though the gap is small.
Live for Speed
Setups and racing lines converge to known optima
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.