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 · Pure Optimization
A 2D sandbox where preparation and gear tiering carry boss fights.

Optimization · Pure Optimization
Zelda-starring adventure where summoning copied objects and monsters solves combat and puzzles alike.
Terraria leans Optimization (Pure Optimization); The Legend of Zelda: Echoes of Wisdom leans Optimization (Pure Optimization).
Terraria leans a little harder on execution, though the gap is small.
Terraria
Boss fights require dodging and aim under pressure.
The Legend of Zelda: Echoes of Wisdom
Light action; echoes fight for you
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Terraria
Bosses use scripted attacks; no adaptation.
The Legend of Zelda: Echoes of Wisdom
Scripted enemies throughout
Terraria leans a little harder on variance, though the gap is small.
Terraria
World seeds and loot drops randomized.
The Legend of Zelda: Echoes of Wisdom
First-run discovery of echoes and rifts
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Terraria
Gear progression and arena prep solve every boss.
The Legend of Zelda: Echoes of Wisdom
Choosing which copied object solves each room
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.