head to head
Grand Theft Auto V asks more than Destroy All Humans! 2: Reprobed, and the gap is reads.

Execution · Practiced Mastery
An open-world alien-invasion action game full of destructive chaos.

Execution · Practiced Mastery
Sandbox crime playground spanning shooting, driving, and a persistent online economy.
Destroy All Humans! 2: Reprobed leans Execution (Practiced Mastery); Grand Theft Auto V leans Execution (Practiced Mastery).
Destroy All Humans! 2: Reprobed leans a little harder on execution, though the gap is small.
Destroy All Humans! 2: Reprobed
aim and movement with alien weaponry
Grand Theft Auto V
Driving and shooting demand decent inputs.
Grand Theft Auto V leans clearly harder on reads.
Destroy All Humans! 2: Reprobed
scripted human NPCs, no true adaptation
Grand Theft Auto V
Online PvP exists but mostly gear/positioning, not modeling.
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Destroy All Humans! 2: Reprobed
some randomized encounters
Grand Theft Auto V
Some mission and lobby randomness.
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Destroy All Humans! 2: Reprobed
weapon and ability upgrade choices
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.