i have owned, wheeled and DD both for decades.
both share the same drivetrains so no big difference there. you can get a turbo'd B in the 7* and now you can get the PZ or the HZ.
the wheel base is similar, both have leafs, both have the full size rear diff, both are 100 year old suspension designs.
seats and leg room front in the 7* series is better.
7* has more sound deadening due to carpet, and deadner on the firewall.
the rear seat configuration of the 7* sucks, i would rather sit facing each other than have my frigg'n knees against my chin like in the 7* (especially the JDM, NO room at all)
DD, then the 7* (especially a turbo'd HZ73 or better yet the turbo'd HZJ77 or PZJ77)
wheeler, the 40 or 7* are both capable but i like the 40 since the rake of the side windows allow for seeing the tire placement with the windows up, less hood coverage when cresting a hill and slightly better approach and departure angles.
don't expect miracles with the 7* but it is a step up over the 40 on road and a step down off road.