head to head
Nioh asks more than Grand Theft Auto V, and the gap is execution.

Execution · Practiced Mastery
Sandbox crime playground spanning shooting, driving, and a persistent online economy.

Execution · Practiced Mastery
A stance-action RPG carried by ki-pulse timing and loot build optimization.
Grand Theft Auto V leans Execution (Practiced Mastery); Nioh leans Execution (Practiced Mastery).
Nioh leans clearly harder on execution.
Grand Theft Auto V
Driving and shooting demand decent inputs.
Nioh
Stance and ki-pulse timing demand inputs
Grand Theft Auto V leans a little harder on reads, though the gap is small.
Grand Theft Auto V
Online PvP exists but mostly gear/positioning, not modeling.
Nioh
Scripted enemies
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Grand Theft Auto V
Some mission and lobby randomness.
Nioh
Loot affix rolls
Nioh leans clearly harder on optimization.
Grand Theft Auto V
Heists, money loops, builds learnable.
Nioh
Build crafting and stance routing reward planning
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.