head to head
Brick Rigs asks more than Grand Theft Auto III, and the gap is reads.

Optimization · Practiced Mastery
A physics sandbox about building brick vehicles and testing their construction.

Optimization · Practiced Mastery
The genre-defining 3D open-world crime game set in Liberty City.
Brick Rigs leans Optimization (Practiced Mastery); Grand Theft Auto III leans Optimization (Practiced Mastery).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Brick Rigs
Driving control matters but it's a sandbox
Grand Theft Auto III
Driving and clunky gunplay set a modest physical bar
Brick Rigs leans clearly harder on reads.
Brick Rigs
Multiplayer chaos, but no structured prediction game
Grand Theft Auto III
Enemies are scripted; nothing models the player
Grand Theft Auto III leans a little harder on variance, though the gap is small.
Brick Rigs
Physics outcomes vary, largely deterministic
Grand Theft Auto III
Pedestrian and traffic chaos lightly randomises encounters
Brick Rigs leans a little harder on optimization, though the gap is small.
Brick Rigs
Engineering stable, capable vehicles is the depth
Grand Theft Auto III
Mission routing and city knowledge are learnable systems
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.