What barmcd said.
A laminated wall also has "studs" inside and interior insulation, but the siding is a sandwich that is glued on, under high pressure. These days the studs are usually aluminum or steel, but wood has been used in the past, and maybe still in some brands. Metal vs wood framing is not
tied to the type of wall construction.
A lot of hype exists re the superior quality of Newmar's "hung wall", but it is worth noting that merely using "hung wall" construction doesn't signify all that much. The very cheapest trailers also have "hung walls". Yeap, they really do. The cheapest "stick & tin" construction uses aluminum side panels screwed to wood studs with some insulation in between, a classic "hung wall".
Here is a blog that discusses some of the differences between hung and laminated walls, pro and con.
In my opinion, a quality wall can be built with either technique. And both of them are assembled off line and set onto the RV floor as a unit. The method of attaching that wall to floor and tying into the roof is just as important as the wall construction. Maybe even more so, since those joints are subject to all the stresses of movement down the road or when leveling.