Just found what I was looking for:

on www.bmw.com

The comparison between 2nd row configurations is evident.

Go to :

X5 2006 ( actually gives E70 model) > Experience > The New BMW X5 link above car > Design > Space Concept.

And then change the perspective....you get to compare how 2nd row changes due to 3rd row ( apart from obvious changes that I have seen )...e.g size of seats in 2nd row, spacing, style !

Sorry to bother you all with my dilemna but I know what I want now....

Persistence pays !