We have a 17' TT that we tow with a mid sized body on frame SUV and it tows great. It's not going to win any drag races towing the trailer, but I've never been in a situation where it significantly s...
No better way to understand or feel the differences between two things like tow vehicles, RVs, etc. than with real world comparative test drives. Tow your intended RV with the SUV and document/record your experience and then do the same with the truck. Do this multiple times in varying conditions and you will start to form an impression of the differences so you can make a decision.
Opinions and words only go so far. Have a go at it and see how each feels.