The choice for us was easy since we absolutely HATE ceiling fans!!!!
Seriously though, we had numerous reasons for choosing a trailer (330RSTS) over a 5er (321RSTS) that had the same floorplan, options, etc.
Everything from how often we were going to tow, steps vs. no steps INSIDE the trailer, options (the same now, including auto leveling), weight (TT is much less), storage capacity (we have more with the pass thru and capped truck bed) overall cost (about 10 grand saved with the same option list) and the fact that I lease my trucks (they frown on punching holes in the bed) made the choice easy for us.
But in the end, your the only one that can take a lot of the insights offered here and make a decision that fits YOUR situation and camping style. Good Luck and make memories!!!!