Need actual owners experience on which 1 ton to buy.

I ran a 2004 6.0 F 250 for 200K miles without any issues. Most of the miles were pulling our old Sunnybrook fiver. We then did a dp Class A for a few years with a Cummins 5.9. After a lot of thought we went back to a fiver. Since the fiver is heavy I looked at upgrading the TV. We went with the 2017 F-350 dually 6.7. Personally I want ride comfort as we are retired and travel a lot. In looking for a tv I would look not only at the mechanical aspects but the longevity of all the components.