head to head
Neither is simply harder - they are hard in different places. The Witcher 3: Wild Hunt demands more optimization; Zombie Army Trilogy demands more execution.

Optimization · Practiced Mastery
A narrative action RPG where build planning matters more than reflex execution.

Execution · Practiced Mastery
A co-op horde shooter testing sniper aim and chokepoint planning against scripted waves.
The Witcher 3: Wild Hunt leans Optimization (Practiced Mastery); Zombie Army Trilogy leans Execution (Practiced Mastery).
Zombie Army Trilogy leans clearly harder on execution.
The Witcher 3: Wild Hunt
Combat timing matters but generous dodges forgive sloppy play.
Zombie Army Trilogy
Long-range sniping and horde kiting demand steady aim
The Witcher 3: Wild Hunt leans a little harder on reads, though the gap is small.
The Witcher 3: Wild Hunt
Enemies use fixed AI behaviours; no adaptation.
Zombie Army Trilogy
Undead waves follow predictable spawn scripts
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
The Witcher 3: Wild Hunt
Loot rolls and minor combat variance only.
Zombie Army Trilogy
Spawn timing varies a little between runs
The Witcher 3: Wild Hunt leans clearly harder on optimization.
The Witcher 3: Wild Hunt
Builds, alchemy, and quest routing reward planning.
Zombie Army Trilogy
Choke points, trap placement and ammo economy reward 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.