There's literally thousands of comments/posts on the comparison between Michelin and Toyo on this forum for at least the past 15 years or even longer so I'd urge you to go back and take a look at some of the threads as there are interesting comments and with both pro-Michelin and pro-Toyo --and also comparing Michelin with other brands too.
It's a philosophical thing with many of us. I'll give you my take without going into a long dissertation that I typically do
Michelin is the OEM tire that most motorhome manufacturers have used for decades with Goodyear and Toyo being the other two. Michelin is the most ubiquitous tire used as OEM, however.
Michelin is a tier-one tire along with brands like Bridgestone and Goodyear. You will pay the most for those brands. There are many opinions and recommendations on tire brands here on the forum as can be expected. Some on the forum refuse to buy any tire other than Michelin as they believe that any other brand is compromising safety. I don't agree with that "opinion" but you can come to your own conclusion. Yes, Michelin is a great tire for use on a motorhome. It has a great reputation in the commercial trucking industry and is always top-rated. But you're going to pay for that NAME.
Me, I just as soon settle with a second-tier tire brand as you get an excellent tire for much less money. Toyo is the most popular replacement for OEM Michelins but I like Sumitomo and Yokohama also as most of their commercial truck tires are now manufactured in the U.S. (Tonawanda New York for many Sumitomo and Falken and West Point Mississippi for most all Yokohama commercial truck tires). Toyo, Sumitomo, and Yokohama are all companies that are subsidiaries and under the corporate umbrellas of companies headquartered in Japan. I also like Hankook that is a South Korean company. So those four brands are my favorites but there are other brands that will be just as safe and and also come close to if not meet the quality of Michelin.
Many have had that dreadful sidewall issue with Michelin. I also had a blowout with one of my OEM Michelinx because of a defect in the sidewall so I'm not a devoted fan to begin with. No, I don't believe that ONLY Michelin is safe. Toyo, Sumitomo, Yokohama, Hankook, and many other second-tier brands come close if not meet the safety and reliability of Michelin for a lot less money. Again, you're paying for the NAME (and their related advertising costs) for first-tier tire brands like Michelin, Bridgstone, Goodyear, Continental, etc.
There was a huge controversy about OEM Toyo tires back in the late 1990s and early 2000 when Country Coach and National RV used them as OEM. There was a recall, lawsuits, and back-forth-blaming because Toyo tires were failing on Country Coach and National RV motorhomes. I believe it turned out to be the fault of the motorhome manufacture mis-specifiying the correct tire for the axle weight calculation and not due to quality issues with Toyo tires. Toyo pulled back their marketing strategy, however, and from that point on and to this day, do not specifically market tires for use on RVs.
So at any rate, my own opinion is to use Toyo, Sumitomo, Yokohama, Hankook, or other second-tier brands for use on a motorhome rather than replacing the OEM Michelin with Michelin.
I don't want to use third-tier tire brands as those are mostly made up of manufacturers that are based in China (PRC) and choose not to knowingly give business to a company who has its corporate headquarters in the PRC. Some Chinese tires are quality products and are very competitively priced but I'd still prefer not to buy them. That's a personal preference, however. There are many who don't mind as Double Coin and Sailun are selling lots of tires in the commercial trucking industry here in the U.S. and are not having issues at all.
So again, all this is only my opinion. I prefer not to pay the premium prices for Michelin, Bridgestone, Goodyear, Continental, etc. They are good products but I don't want to pay extra for the name. My favorite brands again are Toyo, Sumitomo (Falken), Yokohama, and Hankook. Sumitomo and Yokohama commercial truck tires, again, are mostly now made in the U.S. and all four brands --and many others-- will cost less than Michelin with close to or equal quality and engineering as Michelin and will be just as safe. Michelin is a high quality tire but there are others that can meet or in some cases exceed the safety record of Michelin.
This is only my own opinion, however. Many here will disagree but you have to gather all the opinions you see here make your own decision. If you come to the conclusion that Michelin does offer more for the money and is worth paying the premium, by all means, there's nothing wrong with that decision. I choose not to, however.