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.

Optimization · Practiced Mastery
The original open-exploration adventure where hidden secrets and dungeon knowledge are everything.

Optimization · Practiced Mastery
A tense survival horror where one bite kills your survivor for good.
The Legend of Zelda leans Optimization (Practiced Mastery); ZombiU 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.
The Legend of Zelda
Tight sword-poking against aggressive enemies
ZombiU
Deliberate cricket-bat timing and panic inventory management
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
The Legend of Zelda
Enemies move on fixed or random patterns
ZombiU
Zombies shamble on fixed logic
ZombiU leans a little harder on variance, though the gap is small.
The Legend of Zelda
Hidden caves and burn-every-bush secrets
ZombiU
Permadeath runs face unknown spawn placements
The Legend of Zelda leans a little harder on optimization, though the gap is small.
The Legend of Zelda
Dungeon order, item routing, and secret knowledge
ZombiU
Route knowledge, supply caching, safehouse 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.