many RV manufacturers have "twin" brands, same exact trailer but with different outside graphics and inside decor patterns.
they're made on the same assembly line.
some popular or common floorplans will be made by various manufacturers. they'll look similar but usually have some differences.
there is no list of what materials various manufacturers use.
also, realize that your Expy will run out of payload capacity, WAY before reaching its towing capacity. don't just using the towing capacity number and use the Ford Towing Guide to determine its towing capacity.
