I would have to second a few of you guys, while I have not owned a disco 1 or 2, i have owned 4 classics and 2 p38's. driven many dealer's and customer's discos thou.
rangies are much roomier, better for towing, driver's position is bettter ( seems you have a better field of vision.
currently owned classics, 87, 92county, 95 county lwb. past owned a 90county, a2001
henkels and henkels and a 2000hse last two p38's.
all of them went off road at least once during the first couple of weeks of ownership, I loved the articulation capability of the eas (some guys may argue it sucks bla, bla to each their own) over the conventional susp.
but to compare rr over disco off road is difficult with out putting the eas on top... con ventional coils they are equally capable.
now if you throw custom susp work you start a "my d**k is bigger than yours argument". between owners, purists and those who realize that no matter what, the truck has a limit.
I have difficulty seing my self owning a disco partly due to the inside room comparison.