A 'Cosworth' is merely a Sierra, the 3DR is a base model with a bodykit

The Escos is bespoke and only shares 3 panels with lesser models.

In the case of a Saph, it's exactly the same, the 4x4's differed, as said in that they had extra strengthening in the front wings and 'notches' cut into the shell, although all late shells had this anyway IIRC.

Martin