head to head
Grand Theft Auto V asks more than LEGO Batman 2: DC Super Heroes, and the gap is execution.

Execution · Practiced Mastery
Sandbox crime playground spanning shooting, driving, and a persistent online economy.

Optimization · Practiced Mastery
A relaxed collect-athon testing character-ability matching far more than any skill ceiling.
Grand Theft Auto V leans Execution (Practiced Mastery); LEGO Batman 2: DC Super Heroes leans Optimization (Practiced Mastery).
Grand Theft Auto V leans clearly harder on execution.
Grand Theft Auto V
Driving and shooting demand decent inputs.
LEGO Batman 2: DC Super Heroes
Button-mashing combat designed for children's hands
Grand Theft Auto V leans clearly harder on reads.
Grand Theft Auto V
Online PvP exists but mostly gear/positioning, not modeling.
LEGO Batman 2: DC Super Heroes
Enemies are harmless scripted waves
Grand Theft Auto V leans a little harder on variance, though the gap is small.
Grand Theft Auto V
Some mission and lobby randomness.
LEGO Batman 2: DC Super Heroes
Stud and minikit locations are fixed once known
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Grand Theft Auto V
Heists, money loops, builds learnable.
LEGO Batman 2: DC Super Heroes
Matching character abilities to gated collectibles
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.