head to head
DiRT Rally 2.0 asks more than Project CARS, and the gap is variance.

Execution · Pure Mechanics
A punishing rally sim where commitment at speed and smart service-park decisions decide the leaderboard.

Execution · Practiced Mastery
Simulation driving precision underpinned by setup tuning and race strategy.
DiRT Rally 2.0 leans Execution (Pure Mechanics); Project CARS leans Execution (Practiced Mastery).
DiRT Rally 2.0 leans a little harder on execution, though the gap is small.
DiRT Rally 2.0
Millimetre steering corrections at speed define stage time
Project CARS
Braking points and wheel control at the sim limit
Project CARS leans a little harder on reads, though the gap is small.
DiRT Rally 2.0
Solo time-attack format; no adaptive opponent
Project CARS
Online racecraft against humans adds light positional prediction
DiRT Rally 2.0 leans clearly harder on variance.
DiRT Rally 2.0
Hidden surface cuts, gravel buildup and weather are unmappable mid-stage
Project CARS
Dynamic weather injects some session randomness
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
DiRT Rally 2.0
Car setup and service-park tyre choices are fully solvable pre-stage
Project CARS
Setup tuning and pit strategy reward deep study
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.