[Motor31]

The difference between the "levels" is in the fluff area more than anything else. By that I mean the exterior and interior decorations as well as some of the stuff they put inside the rig like flooring. They do not have the capacity to run a lot of different assembly lines for the basic structure. They all have cheap and easy fiberglass batting all around, other than the slide side walls. Those and the slide floors / ceilings have air space. No room for that pesky insulation. You may notice a change if there are single pane vs dual pane windows but that will be minimal as is the insulation effect of those expensive gadgets.