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 · Practiced Mastery
Co-op first-person zombie RPG about improvised weapons on a resort island.

Optimization · Practiced Mastery
A narrative action RPG where build planning matters more than reflex execution.
Dead Island leans Optimization (Practiced Mastery); The Witcher 3: Wild Hunt leans Optimization (Practiced Mastery).
Dead Island leans a little harder on execution, though the gap is small.
Dead Island
first-person melee timing and stamina
The Witcher 3: Wild Hunt
Combat timing matters but generous dodges forgive sloppy play.
The Witcher 3: Wild Hunt leans a little harder on reads, though the gap is small.
Dead Island
zombies are scripted swarms
The Witcher 3: Wild Hunt
Enemies use fixed AI behaviours; no adaptation.
Dead Island leans a little harder on variance, though the gap is small.
Dead Island
weapon drops and spawns add noise
The Witcher 3: Wild Hunt
Loot rolls and minor combat variance only.
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Dead Island
weapon mods and skill builds carry late game
The Witcher 3: Wild Hunt
Builds, alchemy, and quest routing 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.