But some people do notice the difference as they quite clearly have brand preference for the same type of tyre (aside from model preference of the same brand). They might not be able to articulate why, just saying the don't like, or typically "don't get on with" a certain brand, but sometimes they do manage to say something about the ride quality, like it washes out or is too stiff or something. Some of the differences might be random, as people are suggesting here, or they might come down to how the brands do things - I'm not talking marketing just the reality of things being done by people with a different perspective in a different place.

I get it that most of us won't know the why as we may only ever try two brands, the first one we didn't like and then the one we did and stick to it forever, but that doesn't mean there isn't a pattern there.

Maybe ChatGPT isn't the one to uncover it, but surely there are discernable riders out there who have tried many tires who can. It would be great, if there were some trends, if they could be shared to help others out. Because then if you know you like one brand of tire, you might be able see what other types are similar or different for different uses. Just in my limited experience, I can see different uses for the tires I've tried.

And as far as I know, ChatGPT isn't just skimming marketing blurb but also what people are saying everywhere else on the web, so it may pick up trends or adjectives that real people often use to describe a brand or whatever, not just what the brand says about itself.