On the fiberglass to Tin sides. It's a preference the finerglass looks a little nicer but in the end who cares lol.
What I think is more important. Make sure u have enough floor space for your toys
Does it have a fuel station?
Does it have a generator. Does it pull from the toy tank? Not a huge issue if it does. Just comsider it on long weekends.
How much fresh water does it carry I'd like a min 100 gal
Black n grey size? 40 n 40 is acceptable
Batteries. It doesn't come with 6V change em out ASAP if it comes with 1 12v batt get 2 6volt batts ;golf cart batts ((they sell em at SAMs club)
How many peeps can sleep in it. (Is it enough)
I think that's all