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
Big Daddy POV return to Rapture with tighter combat systems.

Optimization · Practiced Mastery
Remake pitting Kiryu against the Dragon of Kansai across two cities.
BioShock 2 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.
BioShock 2
Dual-wield drill and gun 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.
BioShock 2
Splicer AI scripted, not adaptive.
Yakuza Kiwami 2
Enemies follow fixed aggression scripts.
BioShock 2 leans a little harder on variance, though the gap is small.
BioShock 2
Sister-gathering waves add randomness.
Yakuza Kiwami 2
Slight randomness in street encounters.
Yakuza Kiwami 2 leans a little harder on optimization, though the gap is small.
BioShock 2
Plasmid combos and gear loadouts 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.