head to head
Neither is simply harder - they are hard in different places. Dragon Quest XI demands more variance; Portal demands more execution.

Optimization · Pure Optimization
A polished modern JRPG where mastering the skill web and forge system trivializes its scripted encounters.

Optimization · Pure Optimization
The portal-gun puzzle game whose solutions are everything.
Dragon Quest XI leans Optimization (Pure Optimization); Portal leans Optimization (Pure Optimization).
Portal leans clearly harder on execution.
Dragon Quest XI
Draconian mode adds mild timing pressure but base is menu-only
Portal
Portal placement timing modest.
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Dragon Quest XI
No adaptive enemy AI present
Portal
No adversary modeling player.
Dragon Quest XI leans clearly harder on variance.
Dragon Quest XI
Forge RNG and draconian random modifiers add light variance
Portal
Deterministic chambers; no randomness.
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Dragon Quest XI
Skill web routing and forge optimization are the clear mastery layer
Portal
Pure puzzle-solving optimization.
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.