Bigfoot real weights 2500 vs. 1500

We have the Bigfoot in our signature below. The brochure from that year gives the Base Dry Weight at 2790 lb. The weight given on the outside tag says it has a base weight of 3222 lb with 39 gal water, 6 cu ft refrigerator, and 20 lb propane. The interior RV Spec Nameplate sheet gives the Factory Mass as 3,317 lb. I believe the latter is the dry weight with options. So my guess is the weight of the 25C9.4 that was provided by the owner is likely the RV Spec Nameplate weight since I'd expect there to be more than 10 lb difference given the foot difference in length.