head to head
vs
Project Gotham Racing 4vsRock n' Roll Racing
Project Gotham Racing 4 leans Execution (Pure Mechanics); Rock n' Roll Racing leans Execution (Practiced Mastery).
Project Gotham Racing 4Rock n' Roll Racing
Axis by axis
Execution8 vs 7
Project Gotham Racing 4 leans harder on execution: Kudos-style driving demands clean, stylish car control
Reads2 vs 1
Project Gotham Racing 4 leans harder on reads: Online races add light wheel-to-wheel prediction
Variance2 vs 2
Even - both lean on variance about the same.
Optimization5 vs 5
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.