head to head
vs
Grand Prix 3vsProject CARS
Grand Prix 3 leans Execution (Practiced Mastery); Project CARS leans Execution (Practiced Mastery).
Grand Prix 3Project CARS
Axis by axis
Execution8 vs 8
Even - both lean on execution about the same.
Reads1 vs 2
Project CARS leans harder on reads: Online racecraft against humans adds light positional prediction
Variance2 vs 2
Even - both lean on variance about the same.
Optimization7 vs 6
Grand Prix 3 leans harder on optimization: Car setup and race strategy are an engineering layer
Two games can score the same on an axis and still test it in very different ways - read each rationale, not just the number.