head to head
Grand Theft Auto V asks more than Journey to the Savage Planet, and the gap is execution.

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

Optimization · Practiced Mastery
A comedic first-person exploration romp cataloguing a candy-coloured alien planet.
Grand Theft Auto V leans Execution (Practiced Mastery); Journey to the Savage Planet leans Optimization (Practiced Mastery).
Grand Theft Auto V leans clearly harder on execution.
Grand Theft Auto V
Driving and shooting demand decent inputs.
Journey to the Savage Planet
Light shooting and platforming, forgiving
Grand Theft Auto V leans clearly harder on reads.
Grand Theft Auto V
Online PvP exists but mostly gear/positioning, not modeling.
Journey to the Savage Planet
Creature AI is simple and scripted
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Grand Theft Auto V
Some mission and lobby randomness.
Journey to the Savage Planet
Some unknown creature behaviours on first contact
Journey to the Savage Planet leans a little harder on optimization, though the gap is small.
Grand Theft Auto V
Heists, money loops, builds learnable.
Journey to the Savage Planet
Upgrade routing and scan-everything exploration
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.