We have some of both.  Have a load max 32' dual tandem with hydraulic tail.  Have a Load trail tilt lowboy and a Pj of the same build.  The load trail trailers seam a little better built.  The factorys are in the same town.  Two brothers, one has each company.  Have hydraulic jacks on all of our trailers, well worth it in my opinion.

Edit to add. I believe the load max designation is for dual tandem trailers and the load trail trailers are everything else.  All built at the same place.  At least they were in 2014, which was the last time I bought a trailer.