Anything you find new anymore despite the name just about most certainly comes from three medium shitty manufacturers in south Georgia, they are all similar built to kaufmanns. So anyway there's a decent price break-those trailers are all 1" steel box tubing 24" centers walls with lauan interior and ~.035 exterior walls, mediocre-at-best wiring, then there are the "custom" trailers that are 3x the price but are built similar to tractor trailers with riveted al spars and a shit ton more bracing, better wiring, thicker walls etc. In my opinion if you're getting a non high end enclosed just make sure it has good tires and real dexter 5200 + lb axles otherwise they are all just about the same.
So, in short all of the different "brands" you see on craigslist are coming from the same half assed guys in south Georgia. Make sure it has good tires and axles.