Goodyear and Michelin are the only manufacturers that make tires specifically for RV's. The manufacturers all install Goodyear or Michelin on their new coaches. Obviously if they thought the other tires were better, or at least equal, they would save money by installing them on their coaches.
I've had good luck with both Goodyear and Michelin for the long term without ever having a tire failure averaging 15,000 to 20,000 miles per year.
As far as tires handling and riding better, that is an obvious result of replacing old tires, with a worn tread and hardened rubber, with new tires with softer rubber and a deeper tread. Any new tire of any brand will ride better than any brand of old tire. That does not mean they are better since you are comparing apples to oranges.
If you do a search online about tire problems with specific brands, you will see that all of them have had problems at one time or another. Goodyear and Michelin will have had more problems because they are the only tires installed on new RV's and are the choice for replacements by most owners.
The lesser Korean and Chinese truck tires will have fewer complaints because they sell far fewer tires.
To answer the OP's question, I have used both Goodyear and Michelin tires on different coaches, and they have never failed me and I have not noticed any difference in handling and ride, if properly inflated according to your corner weight. Sure they cost more but I can afford them and when it comes to safety for me and my loved ones, I do not buy tires based on price.
