If you look for it, tirerack always has a comparison chart for like types of tires.
One example:
http://www.tirerack.com/tires/survey...jsp?type=UHPAS
After doing the research, I see which ones are available in the size, UTAG,
Traction, Temperature and Speed ratings that I want.
Also, if you look at the specs. it gives you revolutions per mile, section width, contact patch, tire height,etc.
It took me several hours of research to decide on my new shoes.
I ended up with Goodyear Eagle GT 255/40ZR-18 on the front and
B.F. Goodrich Super Sport A/S 275/40ZR-18 on the rear.
(I would have got the Goodyears for the rear as-well except they were not available in 275/40-18)
These replaced the O.E.M. 245/40ZR-18 Comp T/A's on all four corners.
Mine is a Supercharged '97 Cobra. After less than 100 miles, no problems with traction!
Eric