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

Optimization · Pure Optimization
The genre-defining 1993 space 4X of galactic conquest, diplomacy and ship design.

Optimization · Pure Optimization
Engineer a pandemic; evolution order is the puzzle.
Master of Orion leans Optimization (Pure Optimization); Plague Inc: Evolved leans Optimization (Pure Optimization).
Plague Inc: Evolved leans a little harder on execution, though the gap is small.
Master of Orion
Pure turn-based menus
Plague Inc: Evolved
no reflex
Plague Inc: Evolved leans a little harder on reads, though the gap is small.
Master of Orion
AI emperors are predictable policy machines
Plague Inc: Evolved
world response scripted
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Master of Orion
Random galaxies and tech trees vary each game
Plague Inc: Evolved
country event timing
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Master of Orion
Tech beelines and ship design dominate outcomes
Plague Inc: Evolved
evolution order heavily solved
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.