Personal preference still does play a part in performance though. For instance, some may prefer to sacrifice a bit of ultimate grip for a smoother, more progressive breakaway characteristic. This would lead someone to choose the Michelin Pilot Sport Cup over the Yokohama Advan A048.
To some, dry weather grip is king. To others, wet weather or snow is a consideration. There's also breakaway characteristics, treadwear, price, heat resistance (ahem, Falken Azenis), appearance, warranty, and other qualities.
Every tire is a compromise. It's just a matter of picking the best one for your car and your preferences for your pocketbook.
