head to head
Grand Theft Auto V asks more than Kirby & The Amazing Mirror, and the gap is execution.

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

Optimization · Practiced Mastery
An open, maze-like Kirby where four Kirbys explore an interconnected mirror world.
Grand Theft Auto V leans Execution (Practiced Mastery); Kirby & The Amazing Mirror leans Optimization (Practiced Mastery).
Grand Theft Auto V leans clearly harder on execution.
Grand Theft Auto V
Driving and shooting demand decent inputs.
Kirby & The Amazing Mirror
Easy combat with floaty movement
Grand Theft Auto V leans clearly harder on reads.
Grand Theft Auto V
Online PvP exists but mostly gear/positioning, not modeling.
Kirby & The Amazing Mirror
No adaptive opposition
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.
Kirby & The Amazing Mirror
Maze layout unknown until explored
Kirby & The Amazing Mirror leans a little harder on optimization, though the gap is small.
Grand Theft Auto V
Heists, money loops, builds learnable.
Kirby & The Amazing Mirror
Navigating the interconnected mirror-world maze for mirror shards
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.