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
Strategy sim about evolving a pathogen to outpace the world's cure effort.

Optimization · Pure Optimization
A cozy occult shopkeeping game about identifying mysterious plants from books, maps, and cryptic clues.
Plague Inc. leans Optimization (Pure Optimization); Strange Horticulture 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.
Plague Inc.
Tapping menus only
Strange Horticulture
Page-turning and labelling; zero dexterity.
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Plague Inc.
World response is algorithmic, not adaptive to you
Strange Horticulture
Customers follow a script, never adapt.
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Plague Inc.
Spread events and cure pace fluctuate
Strange Horticulture
Unknown plants and clues until identified; fully convergent.
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Plague Inc.
Evolution-point timing strategies are largely solved
Strange Horticulture
Cross-referencing the field guide is a pure deduction system.
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.