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
A park management sim about engineering dinosaurs and containing the consequences.

Optimization · Pure Optimization
A post-apocalyptic robot adventure built on dense lore and logical machine puzzles.
Jurassic World Evolution leans Optimization (Pure Optimization); Primordia 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.
Jurassic World Evolution
Cursor-driven building and ranger driving
Primordia
Pure pointing and clicking, no dexterity
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Jurassic World Evolution
No adaptive opponent
Primordia
No adaptive opponent
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Jurassic World Evolution
Storms, sabotage, and genome luck intrude
Primordia
Unknown solutions first time; nothing random
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Jurassic World Evolution
Enclosure design, genetics, and economy are the core
Primordia
Logic puzzles are fixed and fully solvable
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.