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

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

Optimization · Practiced Mastery
A slow life-sim adventure testing patience, daily routines and light combat.
Grand Theft Auto V leans Execution (Practiced Mastery); Shenmue III leans Optimization (Practiced Mastery).
Grand Theft Auto V leans clearly harder on execution.
Grand Theft Auto V
Driving and shooting demand decent inputs.
Shenmue III
Light fighting timing and QTEs, mostly forgiving
Grand Theft Auto V leans clearly harder on reads.
Grand Theft Auto V
Online PvP exists but mostly gear/positioning, not modeling.
Shenmue III
Sparring AI is scripted, never models you
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.
Shenmue III
Where clues and gambling odds land is mildly random
Shenmue III leans a little harder on optimization, though the gap is small.
Grand Theft Auto V
Heists, money loops, builds learnable.
Shenmue III
Money routines, training grind and clue routing structure the days
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.