I have studied these this past weekend at the Tampa show.
According to every salesman I talked to the undercarriage is the same, the difference is in the amenities. However the brochure shows a GVWR of 14,298 for the 320RS and 13,851 for the 320RSC. The C stands for the Compass line which is new this year. However I have often found mistakes in the brochures before.
The significant differences are that the 320RS include: frameless windows, roller night shades, 3- 20 lb. propane tanks, full view entry door, theater seating, convection oven, stainless steel sink, single lever faucet.
Some options only available on this model is: Trail Air Rota Flex pin box, UV reflective day shades, Heat Pump, bike rack, fiberglass end cap.
You get to select White, Grey, or Cream exterior, three different floor patterns and two different cabinet colors.
We were really were impressed with unit.
Terry and Carol
Daytona Beach, FL
2013 F150 XLT, SuperCab, Ecoboost
2010 Rockwood 8285WS
2014 - 57; 2015 - 91; 2016 - 171