head to head
Neither is meaningfully harder - they pose close to the same test. The widest gap is reads, and it is a single point.

Execution · Practiced Mastery
Simulation driving precision underpinned by setup tuning and race strategy.

Execution · Practiced Mastery
A multi-discipline motorsport sim spanning touring cars, open-wheelers and trucks with aggressive grid racing.
Project CARS leans Execution (Practiced Mastery); TOCA Race Driver 3 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.
Project CARS
Braking points and wheel control at the sim limit
TOCA Race Driver 3
Consistent laps and racecraft across many disciplines.
Project CARS leans a little harder on reads, though the gap is small.
Project CARS
Online racecraft against humans adds light positional prediction
TOCA Race Driver 3
AI rivals race aggressively but predictably.
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Project CARS
Dynamic weather injects some session randomness
TOCA Race Driver 3
Pack chaos and damage create incidents.
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Project CARS
Setup tuning and pit strategy reward deep study
TOCA Race Driver 3
Setups, braking points and discipline-specific lines reward 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.