There's all the Continental "Sporty" tires I see they advertise;ContiSportContact 5,ContiSportContact 5 P,SportContact 6,MaxContact MC5 ,MC6 and UltraContact UC6 .The site/adverts says they're all very good for high performance and all that but never give specific details.What are their performance ranges for the models said previously?Even for the track tires Extremecontact and Contiforcecontact what are the differences.Thank you.