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

Optimization · Systems & Chaos
Building a faction and base from nothing in a brutal open world through layered squad and economy systems.

Optimization · Pure Optimization
A zombie survival sim where long-term planning outweighs moment-to-moment skill.
Kenshi leans Optimization (Systems & Chaos); Project Zomboid 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.
Kenshi
Real-time squad combat has marginal positioning skill ceiling
Project Zomboid
Combat is deliberate; precision matters but is slow.
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Kenshi
Faction and bandit AI follows scripted patrol and raid logic
Project Zomboid
Zombies follow scripted behaviour; no adaptation.
Kenshi leans a little harder on variance, though the gap is small.
Kenshi
Bandit encounters, world states, and loot are substantially randomised
Project Zomboid
Loot spawns and zombie distributions randomized.
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Kenshi
Squad composition, base design, and skill levelling routes are deeply solvable
Project Zomboid
Skill grinding, base setup, and routing define survival.
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.