The Ford chassis did get some modifications in 2010. For one the brakes are bigger, it has a tow/haul mode (you'll see a little trailer with a button on the shifter), new front end design, new dash and longer warranty. You can look at the VIN of the chassis, or just look at the front end. If it has little van headlights it is pre-change. If it has big F150 headlights, then it is the new design.
As for the RV portion, we started a running design change in 2010. If it has the integrated entry step (no power step, but a drop down in the sidewall) it will have these changes.
We went from a steel floor to a thicker aluminum floor with more insulation, we started using Azdel Superlite in place of lauan plywood for a better R-value and noise reduction, heated and enclosed tanks, integrated step, battery in the stepwell and lots of other small changes.
PLEASE do not send questions via Private Message, my inbox fills up too quickly. Post questions in the forum as a new thread so that other users can benefit from the answers. Use Private Messages for sensitive information only (VIN, Contact info or things you do not want the public to see).