head to head
Scarface: The World Is Yours asks more than Grand Theft Auto V, and the gap is optimization.

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

Optimization · Practiced Mastery
An open-world crime game where Tony Montana rebuilds his Miami drug empire from nothing.
Grand Theft Auto V leans Execution (Practiced Mastery); Scarface: The World Is Yours leans Optimization (Practiced Mastery).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Grand Theft Auto V
Driving and shooting demand decent inputs.
Scarface: The World Is Yours
Shootouts and rage-mode management need steady aim
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.
Scarface: The World Is Yours
Gangs and cops follow scripted heat responses
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.
Scarface: The World Is Yours
Drug-deal minigame and cop heat add mild randomness
Scarface: The World Is Yours leans clearly harder on optimization.
Grand Theft Auto V
Heists, money loops, builds learnable.
Scarface: The World Is Yours
The cocaine distribution economy is the real game
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.