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

Execution · Practiced Mastery
Open-world driving that tests car control with a tuning layer underneath.

Execution · Practiced Mastery
Sandbox crime playground spanning shooting, driving, and a persistent online economy.
Forza Horizon leans Execution (Practiced Mastery); Grand Theft Auto V leans Execution (Practiced Mastery).
Forza Horizon leans clearly harder on execution.
Forza Horizon
Driving skill with assists off carries every event
Grand Theft Auto V
Driving and shooting demand decent inputs.
Grand Theft Auto V leans a little harder on reads, though the gap is small.
Forza Horizon
AI drivatars follow patterns; casual online adds little
Grand Theft Auto V
Online PvP exists but mostly gear/positioning, not modeling.
Grand Theft Auto V leans a little harder on variance, though the gap is small.
Forza Horizon
The open world is fixed and fully discoverable
Grand Theft Auto V
Some mission and lobby randomness.
Forza Horizon leans a little harder on optimization, though the gap is small.
Forza Horizon
Car tuning and racing lines reward systematic study
Grand Theft Auto V
Heists, money loops, builds learnable.
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.