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
A first-person Metroid adventure spanning planets, steered with the Wii's motion-aimed cannon.

Optimization · Practiced Mastery
A Katamari-style game about routing through levels absorbing objects against a timer.
Metroid Prime 3: Corruption leans Optimization (Practiced Mastery); The Wonderful End of the World 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.
Metroid Prime 3: Corruption
Pointer aiming and Hypermode management in fights.
The Wonderful End of the World
Movement and timed absorption need modest dexterity
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Metroid Prime 3: Corruption
Scripted bosses and pirates.
The Wonderful End of the World
No adaptive opponent in this solo collection game
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Metroid Prime 3: Corruption
Deterministic worlds.
The Wonderful End of the World
Object placement is fixed, nothing random
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Metroid Prime 3: Corruption
Scanning, sequencing, and multi-planet routing drive progress.
The Wonderful End of the World
Efficient routing to absorb maximum objects in time is key
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.