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 time-hopping JRPG sequel built on stagger combos, paradigm switching, and collecting tameable monsters.

Optimization · Pure Optimization
A 2D sandbox where preparation and gear tiering carry boss fights.
Final Fantasy XIII-2 leans Optimization (Pure Optimization); Terraria leans Optimization (Pure Optimization).
Terraria leans a little harder on execution, though the gap is small.
Final Fantasy XIII-2
Real-time paradigm shifts and QTEs need modest timing.
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.
Final Fantasy XIII-2
Boss behaviours are scripted and learnable.
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.
Final Fantasy XIII-2
Monster drops and timeline secrets until catalogued.
Terraria
World seeds and loot drops randomized.
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Final Fantasy XIII-2
Paradigm decks, monster builds, and stagger routing are the game.
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.