Each manufacturer has good and bad series of tires, so you have to read the review on actual model you are considering.
I had Hancock in 19.5 size on my pickup and at 100k they still had good tread, but aged.
How do you use your motorhome? Are you planning to make 100k miles in next 6-8 years?
Having short time to decide, I replaced Hancock with $150 Sailung (?) and still got over 60k from them