X2 on the Endurance so far.
Ky Grady is correct about the demise of the Marathon brand. Once a rock solid tire you could depend on it was cheapened considerably after manufacturing in the US was discontinued.
Parthery warned me about the new Marathons being sub-par, but I thought, well, I don't know what I thought, but I bought a new set for my Gulfstream 232 tandem trailer several years back. Two of the four blew apart at speed.
Like Ky Grady, I investigated the replacement Endurance tires and, so far, couldn't be happier. I had the largest load range possible ("E" I think?) on my tri-axle trailer that I bought to pull my Marlin and I pulled that 14,600 lb boat to Michigan, back to Fla and the tires were great.
Until Parthery says otherwise, I'm using Endurance.