head to head
Neither is meaningfully harder - they pose close to the same test. The widest gap is optimization, and it is a single point.

Optimization · Pure Optimization
Survival RPG where preparation and logistics matter more than reflexes.

Optimization · Pure Optimization
A 2D sandbox where preparation and gear tiering carry boss fights.
Outward leans Optimization (Pure Optimization); Terraria leans Optimization (Pure Optimization).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Outward
Deliberate stamina combat, punishing but slow
Terraria
Boss fights require dodging and aim under pressure.
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Outward
Enemies use fixed behaviors
Terraria
Bosses use scripted attacks; no adaptation.
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Outward
Dynamic defeat outcomes and weather hazards
Terraria
World seeds and loot drops randomized.
Terraria leans a little harder on optimization, though the gap is small.
Outward
Backpack economy, preparation, and build crafting
Terraria
Gear progression and arena prep solve every boss.
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.