head to head
Neither is meaningfully harder - they pose close to the same test. The widest gap is variance, and it is a single point.

Execution · Practiced Mastery
A grittier crime story where weighty driving and gunplay carry the experience.

Execution · Practiced Mastery
A whimsical physics game about rolling a sticky ball to absorb the world.
Grand Theft Auto IV leans Execution (Practiced Mastery); We Love Katamari Reroll + Royal Reverie leans Execution (Practiced Mastery).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Grand Theft Auto IV
Heavier driving and cover shooting reward control.
We Love Katamari Reroll + Royal Reverie
careful rolling and steering to grow the katamari
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Grand Theft Auto IV
Scripted AI, no adaptive opponent modeling.
We Love Katamari Reroll + Royal Reverie
no opposition, purely solo physics play
Grand Theft Auto IV leans a little harder on variance, though the gap is small.
Grand Theft Auto IV
Minor mission variance.
We Love Katamari Reroll + Royal Reverie
object placement varies minimally
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Grand Theft Auto IV
Mission routing and weapon picks learnable.
We Love Katamari Reroll + Royal Reverie
efficient rolling routes are 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.