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 zombie survival sim where long-term planning outweighs moment-to-moment skill.

Optimization · Pure Optimization
Mastering a richly simulated survival world through its layered metallurgy and seasonal farming systems.
Project Zomboid leans Optimization (Pure Optimization); Vintage Story 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.
Project Zomboid
Combat is deliberate; precision matters but is slow.
Vintage Story
Combat has deliberate timing; temporal storms add pressure
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Project Zomboid
Zombies follow scripted behaviour; no adaptation.
Vintage Story
Drifters and enemies use scripted attack patterns
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Project Zomboid
Loot spawns and zombie distributions randomized.
Vintage Story
World generation and ore veins are hidden and randomised
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Project Zomboid
Skill grinding, base setup, and routing define survival.
Vintage Story
Metallurgy progression and agriculture cycles are deeply systematic
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.