head to head
Neither is harder. They score identically on all four axes, so the difference between them is in kind, not degree.

Execution · Practiced Mastery
A sim racer where driving precision and car tuning both determine lap times.

Execution · Practiced Mastery
Consistent precision driving on top of a solvable car-setup and racing-line layer.
Forza Motorsport 4 leans Execution (Practiced Mastery); World Circuit: The Grand Prix Race Simulation 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.
Forza Motorsport 4
precise braking, throttle, and racing lines
World Circuit: The Grand Prix Race Simulation
Lap-after-lap precision driving decides every race outcome
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Forza Motorsport 4
AI drivers don't meaningfully adapt
World Circuit: The Grand Prix Race Simulation
AI drivers follow fixed racing lines, not minds
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Forza Motorsport 4
minor race incident randomness
World Circuit: The Grand Prix Race Simulation
Weather adds minor unpredictability to otherwise deterministic racing
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Forza Motorsport 4
car tuning and upgrade optimization
World Circuit: The Grand Prix Race Simulation
Car setup, gear ratios and racing lines are solvable engineering
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.