whoever said the srt4 isn't as performance oriented as the 350z is honestly a [censored] moron.
the srt4 was modified for a SINGLE purpose, to race, ANY kind of race. The engine is so overbuilt it makes even the 4g63t in my dsm look mortal in power handling per liter.
the tranny is bullet proof, the turbo design is exactly what you want in a road race/autox. It has neutral handling and the brakes are just WRONG. It doesn't have cruise control, it doesn't have rear power windows. No supple leather and no 500 way power seats.
the car costs 20k, yet performs with cars that cost 10-12k more. It is basically a 20k 03+ Cobra in terms of power per $.
the 350z is a touring car that has the ability to be raced. Maybe the track model would be a good comparo, but even then, they add what? better brakes, get rid of a few weighted features and stiffened up the suspension a tad?(not really sure on this one)