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 post-apocalyptic robot adventure built on dense lore and logical machine puzzles.

Optimization · Pure Optimization
A small-plot city builder where specialization economics and traffic engineering decide success.
Primordia leans Optimization (Pure Optimization); SimCity (2013) 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.
Primordia
Pure pointing and clicking, no dexterity
SimCity (2013)
Mouse planning; no dexterity demands.
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Primordia
No adaptive opponent
SimCity (2013)
No opponent; multiplayer regions cooperate.
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Primordia
Unknown solutions first time; nothing random
SimCity (2013)
Agent simulation quirks behave unpredictably.
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Primordia
Logic puzzles are fixed and fully solvable
SimCity (2013)
Specialization chains and traffic layouts reward systematic planning.
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.