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
The poppy direct sequel to FFX where Yuna's trio swaps job dresspheres mid-battle across Spira.

Optimization · Pure Optimization
One of the deepest classic JRPGs, where party optimization and precise recruitment routing unlock its full richness.
Final Fantasy X-2 leans Optimization (Pure Optimization); Suikoden II 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.
Final Fantasy X-2
Active Time Battle rewards quick menuing slightly.
Suikoden II
Menu combat; duel minigame has mild timing
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Final Fantasy X-2
All enemies follow scripted AI routines.
Suikoden II
All enemies scripted; no player-modeling AI
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Final Fantasy X-2
Drop rates and unknown encounters until mapped.
Suikoden II
Rune drop RNG and recruitment trigger timing add light variance
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Final Fantasy X-2
Dressphere builds, garment grids, and completion routing dominate.
Suikoden II
Party comp, rune combos, and duel answer memorization are solvable
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.