Hpymils
Not sure about the new models but the difference in the older models was the sleeping arrangement.The Versatile slept cross way (shorter bed, check it out if you are tall), across the back but allowed them more room for seating four passengers. The Popular slept length way (longer bed) loosing some of the up front room. They were able to seat a third seat but was the seat was interchangeable with an extra closet being as how the length wise bed cost some closet room. The last Dodge van was produced in 2003 when Dodge introduced the Sprinter but some of the RTs may be still sold as 2004 models.If you go to the Road trek factory web site you can probably find the floor plan for most models including older models.
Bob