What I want to know is, I've seen the new 1.8 Turbo litre model for the Beetle and how come the body has a slightly different design than the 2.0 litre?
Actually, the 1.8T has been in NBs starting in 99 i believe. What you are referring to is the "Turbo S", which is a special edition, hence the different body style.
All regular production NBs have the same body style and there is nothing really to distinguish what is in the car. However, you can tell if it's a turbo because it has the little pop-up spoiler above the rear glass.
The Turbo
