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

Execution · Practiced Mastery
First-person melee timing against scripted hordes, supported by a craftable weapon economy.

Execution · Practiced Mastery
Robot-dinosaur hunting that rewards weak-point study and ranged precision.
Dead Island 2 leans Execution (Practiced Mastery); Horizon Zero Dawn leans Execution (Practiced Mastery).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Dead Island 2
Melee timing, dodges and zombie crowd control need decent hands
Horizon Zero Dawn
Bow aiming and dodge timing matter.
Horizon Zero Dawn leans a little harder on reads, though the gap is small.
Dead Island 2
Zombies follow scripted aggression patterns, never model you
Horizon Zero Dawn
Machines follow fixed patterns, not adapting.
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Dead Island 2
Loot drops and zombie spawns add mild run-to-run noise
Horizon Zero Dawn
Some loot and patrol randomness.
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Dead Island 2
Weapon mods, skill cards and elemental matchups reward planning
Horizon Zero Dawn
Weak points, traps, builds fully solvable.
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.