head to head
Grand Theft Auto V asks more than Mafia: The Old Country, and the gap is reads.

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

Execution · Practiced Mastery
A linear cinematic story with modest shooting and stealth demands.
Grand Theft Auto V leans Execution (Practiced Mastery); Mafia: The Old Country leans Execution (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.
Mafia: The Old Country
Cover shooting and knife duels need only moderate aim
Grand Theft Auto V leans clearly harder on reads.
Grand Theft Auto V
Online PvP exists but mostly gear/positioning, not modeling.
Mafia: The Old Country
Enemies are scripted encounters in a linear story
Grand Theft Auto V leans a little harder on variance, though the gap is small.
Grand Theft Auto V
Some mission and lobby randomness.
Mafia: The Old Country
Set-piece missions play out the same every run
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Grand Theft Auto V
Heists, money loops, builds learnable.
Mafia: The Old Country
Light stealth routing and resource use, nothing deeply solvable
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.