In this case, it is style vs style; ability vs ability. What’s more useful? in pretendland where people do more than display them, the Defender is more useful – seats 9 vs 4. Interior not swallowed whole by central tunnel. Off road, the extra wide hummer has a lower center of gravity (less tippy), but good luck squeezing through with that extra to feet of width.
If we’re talking about the real world of off road, they both lose. Why? Look at the roof. A real jack on the hummer, but neither of them has a matching spare. Fine for a day trip down forest roads where you probably won’t get a blowout.. Not so great when you’re out in the boonies and you have to keep your drivetrain happy when the diffs are locked.