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

Optimization · Pure Optimization
A dialogue RPG resolved by stat builds against dice checks.

Optimization · Pure Optimization
A warm, classic JRPG adventure with deep alchemy crafting.
Disco Elysium leans Optimization (Pure Optimization); Dragon Quest VIII: Journey of the Cursed King 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.
Disco Elysium
No mechanical inputs of consequence
Dragon Quest VIII: Journey of the Cursed King
Turn-based menus, zero dexterity
Disco Elysium leans a little harder on reads, though the gap is small.
Disco Elysium
Dialogue partners are scripted, not modeling you
Dragon Quest VIII: Journey of the Cursed King
Monsters act on fixed logic
Disco Elysium leans a little harder on variance, though the gap is small.
Disco Elysium
Skill checks roll dice with hidden modifiers
Dragon Quest VIII: Journey of the Cursed King
Battle RNG, drops, and casino luck
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Disco Elysium
Build skills and route choices to pass checks
Dragon Quest VIII: Journey of the Cursed King
Skill points, alchemy, and tension are optimizable
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.