No, actually all 350Zs have the same suspension settings as well as engine and drivetrains (auto trans being optional on two trim levels only) but they all have 287hp and 6sp trans as well as front and rear suspension braces. There's 5 trim levels however
350Z(base)
Enthusiast
Performance
Touring
Tack
The base 350Z gets the least traction and electronic aids, no viscous diff, traction control and dynamic control, although they all get ABS.
The next big difference is in rim size all but touring and track get 17" wheels, touring gets 18inchers and track gets forged 18" RAYS wheels.
Next big difference is with the brakes. All models have the same brakes except the track wich gets BREMBO brakes all around.
Then there's trim level. Only the Touring model gets a dash CD changers with BOSE sound and a 10" sub, electric leather seats and tire pressure monitors wich it shares with the track model. You can order leaher seats optional on every model except base and track.
And about the spoiler, its and aero package wich is standard in the track model only, but optional on every other model. It's supposed to enchance airflow. It consists not only of the rear spoiler but a small front lip and rear difusers.
Sorry for the long long reply but I used to be a My350z forums regular until my car was stolen
Anyway great looking Brickyard, and a classic since they are not making them anymore in that particular color...
congrats:xyxthumbs
Ricardo