Our D3 is ten years old, its scratched, dented and knocked about more than most ten year old 4x4's. Does it have character? you bet it does and it has it in spades. It is the most enjoyable vehicle I have ever owned both on and off road and I have no intention of selling it.
In my personal opinion it ranks above a Defender because it does so well quietly behind the scenes what everyone automatically believes the Defender is king at, that being off road prowess.
Put these vehicles on the same spec and size tyres and a Disco is every bit as capable if not more, I actually believe they are more capable and that is even a early model D3 like mine that I'm talking about. LR have suppoesedly dramatically improved the Terrain Responce on several occasions since the first D3's, so I can only guess how good the new ones are now.
We have hardly taken the D4 off road since buying it over 18 months ago but that is because of work more than anything else, so can't really compare but even a MY10 is now fairly old hat compared to the later updated 2012 and then the even later 8 speed models.
The one thing I do know is late model Disco's are vehicles that the vast majority of their owners bulld a strong relationship with, so for those that think a Puma sorry Defender is the only vehicles out there with character, all I would say is, once again your knowledge of other LR products is very limited.

