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
Minimalist transit puzzle; route topology under spawning pressure.

Optimization · Pure Optimization
An original RPG system where engagement optimization and passive-stacking theory dominate hard-mode encounters.
Mini Metro leans Optimization (Pure Optimization); Pillars of Eternity 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.
Mini Metro
light real-time line-drawing
Pillars of Eternity
Real-time-with-pause removes all twitch pressure from the player
Pillars of Eternity leans a little harder on reads, though the gap is small.
Mini Metro
no adversary
Pillars of Eternity
All AI opponents use fixed scripted behaviour trees
Mini Metro leans a little harder on variance, though the gap is small.
Mini Metro
station spawn pattern
Pillars of Eternity
Hidden enemy immunities and ability distributions require investigation
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Mini Metro
line topology and routing
Pillars of Eternity
Per-encounter ability management and passive stacking define trial-of-iron mastery
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.