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 3rd Edition ruleset combat puzzle where multi-classing and feat selection unlock dominant strategies.

Optimization · Pure Optimization
A narrative-heavy turn-based RPG deepening Cold Steel's orbment and Link optimisation with Brave Order resource management.
Icewind Dale II leans Optimization (Pure Optimization); The Legend of Heroes: Trails of Cold Steel 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.
Icewind Dale II
Real-time-with-pause negates twitch requirements
The Legend of Heroes: Trails of Cold Steel II
Turn-based combat; no action timing required
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Icewind Dale II
Scripted enemy routines offer nothing to read or predict adaptively
The Legend of Heroes: Trails of Cold Steel II
Scripted enemy AI throughout; no adaptive opponent
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Icewind Dale II
3E feat combinations and hidden enemy resistances create unknown-information layers
The Legend of Heroes: Trails of Cold Steel II
Quartz recipe unlocks and drop rates add light RNG
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Icewind Dale II
3rd Edition feat optimization and multi-class architecture dominate success
The Legend of Heroes: Trails of Cold Steel II
Turn-order stacking, brave order usage, and ARCUS builds reward deep planning
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.