One more size comparison
AEV Brute Double Cab
wheelbase 139 inches
overall length 216 inches
Interior of pickup bed 61"L x 60"W
width 74 inches, maybe wider due to big wheels and tires
Land Rover Defender 130 Double Cab
wheelbase 127 inches
overall length 204 inches
Interior of pickup bed 65"L x 55"W
width 70 inches
I don't think the numbers given tell the whole story since some are apples to oranges.
For example, the Jeep's width is inclusive of the plastic flares or tires. If you take the bed width and add what looks like five or six inches for the double walls, you come up with a metal body width of about 66", which is the same as if you deduct eight inches for the plastic rear flares' width.
The Jeep's front and rear tracks are 61.9", the Land Rover 130's front and rear tracks are 58.5", so a 3.4" difference there.
Some of the wheelbase difference appears to be in the Jeep's reduced approach angle (ignoring the "crush cans",) with the front axle in the Jeep more forward. The Jeep's rear axle also seems more rearward, at least in comparison to the rear overhang and the cab.
With a 4" difference in the bed length, I wonder how much of the remaining 12" in length is found in the cab or in the hood/bonnet/engine compartment. I've spent some time in a D90, and I think some of the Jeep's length has got to be found in the increased leg room in the cab, at least in the front seats.
All in all, a very similar set up. [EDIT: just found the D130 DC's tow rating, remarkably, it is the same as a standard JKU. I'd have thought more... ]
Here are some photos for comparison:
AEV (as if that wasn't obvious)
Land Rover 130 Dual Cab
Here's the AEV bed:
Here's the AEV rear bumper. It would be interesting if this bumper held water like the original AEV bumper. That hold ~7.5gals, iirc. This one should hold maybe double or more, which would be nice. I noticed in the bed photo that this bumper seems to have provisions for the AEV tirecarrier as well, which would be great.
I wonder if a cap for the bed will be available, or maybe a canvas cap, like the LR.
JPK