If you're perfectly honest with yourself you have to realize that there are more issues with the Goodyear tires than with the Sailun. I rarely read any motorhome forums, but I have glanced at a couple that were talking about blowouts with their Goodyear tires.
And, while Goodyear had some definite issues several years ago, there are still occasional reports of 614 failures. OTOH I've read about 1 Sailun failure that I can recall.
Without knowing the number of Goodyear's sold vs the number of Sailun's sold, and comparative mileage of each, there's no way to accurately compare the reliability of each. However the number of complaints about problems with the Goodyear vs the Sailun weigh in favor of the Sailun.