head to head
Race Driver: Grid asks more than Grand Theft Auto: San Andreas, and the gap is execution.

Optimization · Practiced Mastery
A sprawling open-world crime epic with RPG-style character stats across a whole state.

Execution · Practiced Mastery
Aggressive circuit racing testing car control over memorisable tracks and braking points.
Grand Theft Auto: San Andreas leans Optimization (Practiced Mastery); Race Driver: Grid leans Execution (Practiced Mastery).
Race Driver: Grid leans clearly harder on execution.
Grand Theft Auto: San Andreas
Flying school and drive-bys need decent hands
Race Driver: Grid
Aggressive wheel-to-wheel car control is the core demand
Race Driver: Grid leans clearly harder on reads.
Grand Theft Auto: San Andreas
Gang AI is scripted, never adaptive
Race Driver: Grid
Online racing adds light opponent positioning awareness
Grand Theft Auto: San Andreas leans a little harder on variance, though the gap is small.
Grand Theft Auto: San Andreas
Territory wars and traffic add light randomness
Race Driver: Grid
Damage outcomes add slight unpredictability to contact
Grand Theft Auto: San Andreas leans a little harder on optimization, though the gap is small.
Grand Theft Auto: San Andreas
Stats, gym, weapon skill, and routes reward systematic play
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.