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

Optimization · Practiced Mastery
Tests routing an ever-growing ball through fixed stages against the clock.

Execution · Practiced Mastery
A third-person action platformer where you blast scripted alien hordes while leveling an arsenal of gadgets.
Me & My Katamari leans Optimization (Practiced Mastery); Ratchet & Clank: Into the Nexus leans Execution (Practiced Mastery).
Ratchet & Clank: Into the Nexus leans a little harder on execution, though the gap is small.
Me & My Katamari
Awkward PSP rolling controls demand constant steering effort
Ratchet & Clank: Into the Nexus
Aiming, strafing, and platforming under fire carry combat
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Me & My Katamari
Objects and people never adapt to the ball
Ratchet & Clank: Into the Nexus
Scripted enemy waves; no adaptive opponent
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Me & My Katamari
Object layouts are fixed per stage
Ratchet & Clank: Into the Nexus
Fixed level layouts, minimal hidden information
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Me & My Katamari
Size-growth routing per stage has learnable optimal paths
Ratchet & Clank: Into the Nexus
Weapon upgrade paths, bolt economy, gold bolt routing
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.