Neither. Get a 8 1/2 foot S&S. You get the whole 9 yards with a real 8 foot truck bed.
Huge face to face dinette ,double bowl stainless sink , larger fridge and freezer plus a huge closet in the living area plus a generator and two 30 lb propane tanks to boot.
Dual group 31 battery compartment.
The storage in the over cab blows the WC away and it has the pass thru windows etc.
No comparison, and as for the Adventurer, go see one for your self.
S&S hands down the nicest 8.5 foot truck camper available.
8.5 FBSC
http://www.s-scampers.com/ponderosa.php?page=floorplans