Hey Jose, can you elaborate on this?
Yes. With the NBS you can remove row three entirely and row two folds down completely flat. There is an uninterrupted cargo area that is at least three feet tall, four feet wide and eight feet deep. I used my NBS to bring a couch home from Sam's Club, and, the box was exactly this size.
With the NNBS you can remove row three but there are plastic guide tracks on the floor that make the floor not perfectly flat. Row two can fold down but is not flush with the cargo area. If you fold and tumble row two there are two concerns. One, the seats are not secured in the vertical position, which means they'll fall backward unless you secure them. I tie a ratchet strap between a bar under the row one seat and the row two seat's top tether anchor to keep it from falling (or cargo can keep it upright). Two, the seats when tumbled reduce fore-aft clearance at floor level by a foot. In either case, there is no gap filler plate between row 3 and row 2.
The Excursion has a similar problem- row two does not fold completely flat. But it's less severe than on the NNBS: the seat backs are at about a ten degree angle to the cargo floor, instead of just sitting 4-6 inches higher.
When we were renovating the garage the NBS was able to bring home about twenty-five sheets of drywall with no trouble at all. Went right in, came right out. If I wanted to do this with my NNBS we'd either have to stack the drywall sheets on cinder blocks and plywood to be even with the row two folded seat (and be able to carry less), or remove the row two seat entirely (and build a rack to create an even floor, and remove the row three plastic guides).
I don't think PPV NNBS trucks have the plastic guides, at least.
Realistically, I also own a 17' landscape trailer, so if I need to bring home that much drywall again, or get another couch, I'll use the trailer.
Interior space is otherwise extremely similar on the NBS and NNBS. Both have about 40" of cargo height at the center of the loading floor. If you wanted to do something like an RV conversion (bed in the back) you'd be looking at ripping out a bunch of the interior anyway so there is no real difference.
I also feel like my '01 Denali's interior was just higher quality than my '13 2500. The buttons are a higher quality plastic, the doors have lights, the seats are a bit more comfortable (closer to a couch than an airliner seat), the dashboard wasn't cracked, it had fewer rattles. GM really scrimped on the NNBS interior. But my '01 was bleeding me dry with maintenance costs (since I'm not able to do many repairs myself at the moment).
