Firstly, are you comparing the Tvan with the Conqueror.
Or the Topaz Caravan type camper by Track trailers with the Conqueror?
Tvans as such have been around since at least 2000, in various sizes/styles.
I own a 2009 Canning Model of the Tvan myself.
The later Tvans, 2011 onwards, are slightly larger than the previous Models.
More room inside, with a taller and wider body, than the 2010 ones.
There is a slide out kitchen in the Left side locker on most of them.
Some models were missing the kitchen to lessen the hitch weight.
These were the Sport &/or Yulara models I believe.
Best way to compare, is to try them out.
At least go to a show, and kick some tyres.
As for Altitude enhanced humans.
Track make a Bed extension for the Queen size beds in the Tvan if needed
My Tvan. will go anywhere the 105 Cruiser can tow it.
There is also the Forum in the yahoo groups.
https://au.groups.yahoo.com/neo/groups/Track_Campertrailers/infoAs well as the Forum at this link.
http://www.tracktrailerforums.com/index.php