head to head
Neither is harder. They score identically on all four axes, so the difference between them is in kind, not degree.

Optimization · Pure Optimization
A dual-protagonist JRPG where mastering cross-character fusion and combo optimization resolves all scripted encounters.

Optimization · Pure Optimization
The poppy direct sequel to FFX where Yuna's trio swaps job dresspheres mid-battle across Spira.
Breath of Fire IV leans Optimization (Pure Optimization); Final Fantasy X-2 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.
Breath of Fire IV
Menu combat; combo system has minor sequencing
Final Fantasy X-2
Active Time Battle rewards quick menuing slightly.
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Breath of Fire IV
No adaptive foes; all patterns are fixed
Final Fantasy X-2
All enemies follow scripted AI routines.
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Breath of Fire IV
Random encounter variance and some enemy action randomness present
Final Fantasy X-2
Drop rates and unknown encounters until mapped.
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Breath of Fire IV
Cross-Ryu fusion, combo chains, and AP economy are the solvable layer
Final Fantasy X-2
Dressphere builds, garment grids, and completion routing dominate.
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.