I had Marathons on my first Ranger (1997 462) as OEM, never saw a reason to run anything else. Put a couple sets on that boat...single axle, plus I pulled it a lot. A lot, a lot.
The set I swapped out on the 521 in '18 still had great tread. Just didn't fully trust 13 year old tires, for obvious reasons. Still have one as a spare, in fact.
The Endurance is a much more "solid" tire. Trailer doesn't jump around as much off bumps or at highway speed, or in wind. Better towing experience generally. Price isn't much worse than some other quality trailer tires.