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

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

Execution · Practiced Mastery
Sandbox crime playground spanning shooting, driving, and a persistent online economy.
Brick Rigs leans Optimization (Practiced Mastery); Grand Theft Auto V leans Execution (Practiced Mastery).
Grand Theft Auto V leans a little harder on execution, though the gap is small.
Brick Rigs
Driving control matters but it's a sandbox
Grand Theft Auto V
Driving and shooting demand decent inputs.
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Brick Rigs
Multiplayer chaos, but no structured prediction game
Grand Theft Auto V
Online PvP exists but mostly gear/positioning, not modeling.
Grand Theft Auto V leans a little harder on variance, though the gap is small.
Brick Rigs
Physics outcomes vary, largely deterministic
Grand Theft Auto V
Some mission and lobby randomness.
Brick Rigs leans clearly harder on optimization.
Brick Rigs
Engineering stable, capable vehicles is the depth
Grand Theft Auto V
Heists, money loops, builds 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.