The first three, look vey similar to my Kodiak 200QB, may be a little shorter, but close on floorplans.
Not trying to be a downer, but be careful, if the unit is right at 4,000 lbs (which I would guess, the double-axle ones, with a slide are close too), you may not have enough tow vehicle, depending on where you plan to travel.
I bought my Kodiak 200QB, wieght is 3,986 (unloaded)--originally had a Toyota Tacoma with tow package, rated to tow 6,500.....it could pull it, but was going to REALLY, REALLY strain it, it shiffted up & down, struggled on any hill to keep speed, and did not feel real safe, stopping (now it was my first towing, a larger thing). I quickly, upgraded to Tundra, I am super glad. We do alot of traveling with our Kodiak 200QB, out of Atlanta area, many times into the Mtns. May depend on the type of travling you are going to be doing.
As far as the 4 you are looking at, have heard that APex using Adzel walls, may be benefit over the others?
Still comes down to storing, and maintaining them all for longevity.
Check them out with slides in, we routinely use ours during stops, coming & going into the unit. I suspect with the smaller slides, won't be and issue, but check it out.
Good luck and have fun!
Markiemark