.
NOT MUCH !
RV Manufacturers build them the same way using the same components .
Major Upgrades include decals , artwork , and the ugliest interior patterns known to man .
Things that should be done :
Residential refrigerator with dual compressors ( double the cu ft and 1/2 the size )
Disc brakes on all wheels ( including air disc for DP's )
E coated insulated glass
Energy Management System with larger engine driven generators
Multiple batteries should be standard not an option
Maximum Insulation for Sound / Vibration and Heat / Cold Penetration
RV manufacturers are like most home builders , they use a minimum standard building code , with
the cheapest materials and unskilled labor , and offer a minimum warranty that has many exclusions .
Quality , Workmanship , and Integrity are words not found in the vocabulary of the RV Industry .