Make a car wil be more accurate with a nurbs program than a subD program for example ;)
That will not say that you can't make a car with a subD prog ;)
But in industry production you don't use SbD for make a car, for make images of car you can ;)
Take a look at this ;) http://www.etereaestudios.com/docs_html/nixus_htm/nixus_index.htm
Nurbs are integrated into the process of conception it self as drawing tool!
Look also this tut http://www.etereaestudios.com/training_img/sentinel_tutorial/sentinel_tutorial.htm

In SubD it will be more difficult to input simple curves so easy ;)
In a nurb prog a curve can be used as a tool for "cut" a volume, in SubD it's an another story ;)

In Moi you can use curve as tools of drawing ;)