The OP wants to know differance between Saff and 3 door, to which having got both I would say the roof is the same and so front winscreen to back (MK2 hatch and Saph this is) for example the doors between saff and hatch are interchangable as well, I think it's just the 'Boot on the back' that makes the difference. MK1 I would imagine may differ.

Martin