head to head
Neither is harder. They score identically on all four axes, so the difference between them is in kind, not degree.

Optimization · Practiced Mastery
Routing size-ordered pickup paths under time pressure with quirky rolling controls.

Optimization · Practiced Mastery
Darker Prime sequel built on mirrored light and dark world traversal.
Beautiful Katamari leans Optimization (Practiced Mastery); Metroid Prime 2: Echoes leans Optimization (Practiced Mastery).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Beautiful Katamari
Dual-stick rolling control matters but forgives sloppiness
Metroid Prime 2: Echoes
lock-on combat, harsher but still forgiving aim
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Beautiful Katamari
Cousins and objects never react to your strategy
Metroid Prime 2: Echoes
Ing follow scripted patterns
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Beautiful Katamari
Object placements are fixed after a first look
Metroid Prime 2: Echoes
dark-world hazards surprise until learned
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Beautiful Katamari
Size-ordered pickup routing is the real scoring game
Metroid Prime 2: Echoes
dual-world routing and key hunts reward planning
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.