The Carlisle HD and the Endurance have been out just over a year now so we don't have any long term pros or cons to report. They are the new gen higher speed rated. Their shaped better and look more like a automotive tire instead of a rounded wheel barrow like previous Marathons.....Radial Trail express......Tow Max (blow max as their known around the trailer industry).
The Providers ST have been out about 8 years now and is one of the first new gen tires to hit the highway. Check out their ST185/80-13 C load range.
On my boat trailers and other small speciality trailers that use 13" tires I sell the OEM may pops on CL to lawn service trailer users. I then find a P tire with 44-51 psi with around 20 percent reserve capacity above the trailers axles ratings. P tires can be ran at any speed all day and nite with years of service. With 44-51 psi no issues with the beads unseating like the old P tires at 32 psi.