For the 1 ton and ride, if you full time you are going to want to look at a pickup air bag system. It will soften up the unloaded and loaded ride.
The air pin boxes or a dampening pin box, and better springs or air bags on the 5er. Of course the DP have them already.
Mobility of the people using them should also be taken into account. As mentioned above 4 steps inside does not seem like much but you will be going up and down them more than in and out more likely than not.
I do not know on the difference on the CCC but you are going to have to keep that in mind.
You will hear discussions about loosing your house if it requires maintenance, after 5 years in their Allegro DP my parents have found a couple of discomforts but have not had to leave their home. They have been to larger repair shops and back to Tiffen for repairs and changes.
2015 F350 Lariat Diesel Dually, White, Hitch Kit.
2013 Dutchman Voltage 3200 Epic II 5th wheel.