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.

Execution · Practiced Mastery
Robot-dinosaur hunting that rewards weak-point study and ranged precision.

Optimization · Practiced Mastery
Remake pitting Kiryu against the Dragon of Kansai across two cities.
Horizon Zero Dawn leans Execution (Practiced Mastery); Yakuza Kiwami 2 leans Optimization (Practiced Mastery).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Horizon Zero Dawn
Bow aiming and dodge timing matter.
Yakuza Kiwami 2
Dragon Engine brawling rewards timing without demanding mastery.
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Horizon Zero Dawn
Machines follow fixed patterns, not adapting.
Yakuza Kiwami 2
Enemies follow fixed aggression scripts.
Horizon Zero Dawn leans a little harder on variance, though the gap is small.
Horizon Zero Dawn
Some loot and patrol randomness.
Yakuza Kiwami 2
Slight randomness in street encounters.
Yakuza Kiwami 2 leans a little harder on optimization, though the gap is small.
Horizon Zero Dawn
Weak points, traps, builds fully solvable.
Yakuza Kiwami 2
Ability tree, gear and minigame economies reward study.
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.