head to head
Stellar Blade 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 character action RPG built on tight parry timing against elaborate scripted bosses.
Grand Theft Auto V leans Execution (Practiced Mastery); Stellar Blade leans Execution (Practiced Mastery).
Stellar Blade leans clearly harder on execution.
Grand Theft Auto V
Driving and shooting demand decent inputs.
Stellar Blade
Parry and perfect-dodge timing windows define the ceiling
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.
Stellar Blade
Bosses run fixed movesets, learnable not adaptive
Grand Theft Auto V leans a little harder on variance, though the gap is small.
Grand Theft Auto V
Some mission and lobby randomness.
Stellar Blade
Encounters and loot are static and predictable
Stellar Blade leans clearly harder on optimization.
Grand Theft Auto V
Heists, money loops, builds learnable.
Stellar Blade
Exospine builds, gear and moveset study reward preparation
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.