All depends on your use,,
If its used everyday for a commute to work, motorways etc, the disco is much more refined,, with the defender not in the same league ??
But the defender/90/110 have a character, the Disco could never obtain, Plus the defender should , on past experience hold the valve so much better !!
However, if a job of work ?
I need a "barge" as Mo describes them.. which can seat 4/5, space for heavy tools spares etc in the rear. a large roof rack for wheels /tyres, and a large awning etc, and tow a trailer, of everything out there, there is nothing i can find to do the job better than a 110 Defender