That's the thing people fail to understand , every car is different, there are heaps of factors to come to play.Good luck getting stock versions of each car running at out of factory conditions. Things such as tyres play a massive part in determining the faster car. Engine life will play a good part as most DC2R's having higher kms with loss compression etc.
One thing I can note from experience is that the Audm k20a2 feels some what toned down vs jdm k20a. If only we got the whole package here....sighhhh