head to head
Sifu 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
Drilling fixed enemy movesets until parry-perfect execution carries a run.
Grand Theft Auto V leans Execution (Practiced Mastery); Sifu leans Execution (Practiced Mastery).
Sifu leans clearly harder on execution.
Grand Theft Auto V
Driving and shooting demand decent inputs.
Sifu
Parry and dodge timing on tight windows is everything
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.
Sifu
Enemies attack from fixed movesets, never adapt
Grand Theft Auto V leans a little harder on variance, though the gap is small.
Grand Theft Auto V
Some mission and lobby randomness.
Sifu
Levels are deterministic once learned
Sifu leans clearly harder on optimization.
Grand Theft Auto V
Heists, money loops, builds learnable.
Sifu
Learning movesets, shortcuts and the aging economy is the meta
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.