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

Optimization · Systems & Chaos
An inspection-procedure test of judging hidden infections under base-building pressure.

Optimization · Systems & Chaos
Managing a survivor community's economy and risk under permadeath randomness.
Quarantine Zone: The Last Check leans Optimization (Systems & Chaos); State of Decay 2 leans Optimization (Systems & Chaos).
State of Decay 2 leans a little harder on execution, though the gap is small.
Quarantine Zone: The Last Check
Inspecting survivors and managing defenses needs no dexterity
State of Decay 2
Combat is forgiving; stealth and swings need modest timing
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Quarantine Zone: The Last Check
Survivors are generated cases, not adapting deceivers
State of Decay 2
Zombies and hostile NPCs follow randomised scripts
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Quarantine Zone: The Last Check
Each arrival's infection status is hidden until inspected
State of Decay 2
Permadeath, infestations and survivor traits randomise each community
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Quarantine Zone: The Last Check
Mastering inspection rules and base economy converges to procedure
State of Decay 2
Base building, resource routing and survivor management drive 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.