head to head
Iron Grip: Warlord 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
A tower defense FPS hybrid about placing defenses and gunning down waves.
Grand Theft Auto V leans Execution (Practiced Mastery); Iron Grip: Warlord 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.
Iron Grip: Warlord
First-person shooting demands some aim under pressure
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.
Iron Grip: Warlord
AI invaders follow scripted waves, no adaptation
Iron Grip: Warlord leans a little harder on variance, though the gap is small.
Grand Theft Auto V
Some mission and lobby randomness.
Iron Grip: Warlord
Wave composition adds some uncertainty
Iron Grip: Warlord leans clearly harder on optimization.
Grand Theft Auto V
Heists, money loops, builds learnable.
Iron Grip: Warlord
Tower placement and resource management defend the city
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.