head to head
Gran Turismo 7 asks more than Dirt 3, and the gap is optimization.

Execution · Practiced Mastery
Precise rally car control over stages that reward memorisation and tuning.

Execution · Practiced Mastery
A simulation racer where tuning and clean laps dominate the podium.
Dirt 3 leans Execution (Practiced Mastery); Gran Turismo 7 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.
Dirt 3
Car control on loose surfaces is a high physical ceiling
Gran Turismo 7
Braking points and throttle modulation define lap times.
Gran Turismo 7 leans a little harder on reads, though the gap is small.
Dirt 3
Racing the clock or scripted AI, nobody adapts
Gran Turismo 7
AI is scripted; online drivers offer minor adaptation.
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Dirt 3
Surface conditions and minor physics noise per run
Gran Turismo 7
Tire wear and weather add modest randomness.
Gran Turismo 7 leans clearly harder on optimization.
Dirt 3
Stage knowledge and setup tuning reward study
Gran Turismo 7
Car setup, tuning, and pit strategy heavily decisive.
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.