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.

Execution · Practiced Mastery
Cinematic combo-action reboot of Castlevania in the God of War mold.

Optimization · Practiced Mastery
Remake of the original Yakuza following Kiryu's return to Kamurocho.
Castlevania: Lords of Shadow leans Execution (Practiced Mastery); Yakuza Kiwami leans Optimization (Practiced Mastery).
Castlevania: Lords of Shadow leans a little harder on execution, though the gap is small.
Castlevania: Lords of Shadow
Combo timing, dodges, and QTE precision
Yakuza Kiwami
Brawling combos and dodges are forgiving but present.
Yakuza Kiwami leans a little harder on reads, though the gap is small.
Castlevania: Lords of Shadow
Bosses and titans are fully scripted
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.
Castlevania: Lords of Shadow
Deterministic encounters
Yakuza Kiwami
Minor randomness in encounters and minigames.
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Castlevania: Lords of Shadow
Combo unlocks and learning fixed movesets
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.