Smaller trailers don't carry the same problems as larger trailers do. I won't buy another plastic trailer(burro's and such molded trailers don't fit my description). Rather I am referring to the flat sided "constructed side" trailers. the practice is glue plastic panels to thin plywood. glue a foam panel to the plywood, then glue another plywood panel to that and vola you now have a wall. The plastic will de-laminate at the drop of a hat and lower the value considerably. Some have wood studs others have aluminum frames. Of those that have aluminum frames, some are welded others aren't. If you like windows choose welded alu. frame.
Welded frames are more ridged therefore a better choice. wood construction if glued and screwed I like best. I only want aluminum siding over plastic. It will not de-laminate but such construction is harder to find.
If you wonder why plastic de-laminates, consider this. When the rig has not been leveled you will notice things don't line up right. This is flex and will distroy the bonding of the glue used. over time you can imagine how this problem progresses. It is believed that water is the problem but I would argue.
Your choice for smaller trailers is in my opinion a very good choice. the larger the rig the more it will flex and bring about the problem I discuss above.
If when you walk from front to back in the rig if you feel the floor give under your feet, ask that the trailer be leveled, If you can still feel the floor flex less than optimal support is under the floor boarding. What this leads to is flooring material cracks or separates. although carpet is used to hide this problem carpet is far from the best flooring in an RV.
If you really look at cabinets in your RV you will deduce that they are for the most part garbage. If this bothers you don't buy an RV trailer.
all components in an rv like plumbing are shared in the different makes. You can upgrade many of these items with regular house items,( they fit) and if you go full time you will see them fail in short order.
To close;
Because things change often in the RV manufacturing industry it is hard to claim one manufacturer makes better rigs. What is on the other, or inside of a wall can not be a sure thing. Most will have problems, but most will give reasonable service with maintenance. This comment is my opinion but when a manufacturer tells you they changed a product to improve it, it is more likely they found another way to cut a corner, and have increased their profits.