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
A PSP prequel following three keyblade wielders with a deep command-melding build system.

Optimization · Practiced Mastery
Remake of the original Yakuza following Kiryu's return to Kamurocho.
Kingdom Hearts Birth by Sleep leans Optimization (Practiced Mastery); Yakuza Kiwami leans Optimization (Practiced Mastery).
Kingdom Hearts Birth by Sleep leans a little harder on execution, though the gap is small.
Kingdom Hearts Birth by Sleep
Dodge timing against brutal secret bosses
Yakuza Kiwami
Brawling combos and dodges are forgiving but present.
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Kingdom Hearts Birth by Sleep
Pattern-based bosses, no adaptation
Yakuza Kiwami
Majima ambushes are scripted, not adaptive.
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Kingdom Hearts Birth by Sleep
Command melding outcomes are documented
Yakuza Kiwami
Minor randomness in encounters and minigames.
Kingdom Hearts Birth by Sleep leans a little harder on optimization, though the gap is small.
Kingdom Hearts Birth by Sleep
Command deck melding largely solves the game
Yakuza Kiwami
Style upgrades, heat moves and gear are learnable systems.
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.