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
Reverse-horror metroidvania where you play the escaped flesh monster.

Optimization · Practiced Mastery
A first-person Metroid adventure spanning planets, steered with the Wii's motion-aimed cannon.
Carrion leans Optimization (Practiced Mastery); Metroid Prime 3: Corruption 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.
Carrion
Fluid tentacle movement and snatch timing
Metroid Prime 3: Corruption
Pointer aiming and Hypermode management in fights.
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Carrion
Guards follow simple fixed behaviours
Metroid Prime 3: Corruption
Scripted bosses and pirates.
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Carrion
Layouts and encounters are fixed
Metroid Prime 3: Corruption
Deterministic worlds.
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Carrion
Route memory and biomass upgrade puzzles
Metroid Prime 3: Corruption
Scanning, sequencing, and multi-planet routing drive progress.
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.