Earlier (pre-Td5) 110 station wagons had the self-levelled suspension setup, with soft springs and the Boge hydraulic damper unit which would pump up the rear when loaded up. This gave a nice ride even when empty, and the vehicle sat level. The only problem was the Boge units were pretty crap and generally failed after a while, meaning the suspension would sag under load. The early Range Rovers had the same setup, hence the comparison in ride quality.
On later station wagon vehicles Land Rover did away with the leveller unit and just fitted progressive springs, these are by necessity a compromise so the ride isn't quite as soft, however they can carry a load without sinking unduly. However it does result in the slight nose-down attitude one sees in later vehicles.
I'm not sure if you can still buy new Boge units, I doubt it given the age. However you can replace its function with airbag helper springs, this way you can still run the softer coil springs but retain a load carrying ability. The wallowyness that comes with softer suspension can be alleviated to some extent by anti-roll bars (to the detriment of some articulation) however it will never corner like a stiffer-sprung vehicle.
All compounded of course by the other NVH measures outlined by 300bhp/ton which go to make the Range Rover more pleasant to be in generally. However if we are just talking about the suspension then I believe the above is valid.
