(only a professional race driver on track would tell one apart from another!)
not for want of upsetting more members I totally agree.
A lot of people say they can outdrive their tyres but really they are normally just driving beyond the road conditions & sometimes their ability. Mileage wear is another consideration, as is noise, but there are too many inconsistant factors that normally can't be collected to get true results. Tyre pressures, type of road surfaces, condition of suspension & tracking etc being the main ones.
I have lots of these cars, most with different tyres(some not even matched!) & unless a tyre is down on pressure or badly mis-shapen I don't really notice any difference. I have noticed that bald tyres aren't much good in the wet though.
But, just to contradict myself, I would say that a Michelin Sport is probably better than the cheapest budget tyre from Taiwan(but it might not necessarily last as long).
Some people swear by a certain brand & stick with them. If it makes them feel, & drive, safe then why not? It's a psychological thing & helps inspire confidence.
Tyres for racing & track days are a slightly different topic, see what the fast guys are using & copy them.
I've recently bought a set of Falken 452s for a V6, they seem 'nice' & get good reports.