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
Soft-body physics sandbox driving and crashing.

Execution · Practiced Mastery
The original top-down crime sandbox where you rack up points causing mayhem across three cities.
BeamNG.drive leans Execution (Practiced Mastery); Grand Theft Auto leans Execution (Practiced Mastery).
BeamNG.drive leans a little harder on execution, though the gap is small.
BeamNG.drive
Soft-body physics car control
Grand Theft Auto
Twitchy top-down driving and shooting under police pressure
BeamNG.drive leans a little harder on reads, though the gap is small.
BeamNG.drive
Mostly sandbox, no adaptive opponents
Grand Theft Auto
Cops follow simple scripts; nothing adapts
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
BeamNG.drive
Emergent crash physics outcomes
Grand Theft Auto
Chaotic traffic and wanted-level escalation surprise players
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
BeamNG.drive
Vehicle tuning, scenario routing
Grand Theft Auto
Score targets reward learning missions and city layouts
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.