Sailun did not develop its stellar reputation overnight.
Much in the way a RV trailer puts added stress on a tow vehicle vs. most other family use trailers. RV tires should be held to a higher standard than a typical trailer tire.
RV tires carry a very non aeroadynamic load. They are heavily stressed when parked in tight spots. Typically they carry a heavier load than most non professional trailers their size
They are used 100's of miles away from home, often in remote areas.
Using a no name off brand tire for a utility trailer or a locally used boat trailer does not require the same rigor and reliabilty required by an RV trailer.
With that in mind I prefer the weight, additional capacity margin and stellar reputation of Sailun vs. the other off brand tires.
Sure you could gamble with some other off brand RV tire, but why when there is a proven and tested tire available? Sailun its reputation speaks for itself.