We have Westlake on our unit currently and have driven approximately 3,000 miles over that past three years. No issues.
On our previous camper, we went approximately four years with Carlisle and then replaced with Maxxis for another four years, also with 3-4,000 miles with no issues.
I know there is junk out there, and I suppose we've been lucky. I do however check the air pressure religiously before every trip (including the return trip home) and always ensure the tires are at maximum cold pressure. I'm also careful to not rub against / over curbs and potholes if I can help it. We also cruise at 60mph (ST tires typically max out at 65 mph) so as to not overheat the tires and save fuel.
For the time I've been doing this, I've yet to see a true consensus on which tires are best, and which are the worst.
I don't think there's a true answer to your question, only opinions and war stories.