head to head
vs
Colin McRae: DirtvsTest Drive 6
Colin McRae: Dirt leans Execution (Pure Mechanics); Test Drive 6 leans Execution (Pure Mechanics).
Colin McRae: DirtTest Drive 6
Axis by axis
Execution8 vs 7
Colin McRae: Dirt leans harder on execution: Car control on loose surfaces is the entire test
Reads1 vs 1
Even - both lean on reads about the same.
Variance2 vs 1
Colin McRae: Dirt leans harder on variance: Surface grip and damage add mild run noise
Optimization4 vs 4
Even - both lean on optimization about the same.
Two games can score the same on an axis and still test it in very different ways - read each rationale, not just the number.