Cooper Cobra GT vs Hankook Ventus (H101)

I never seen a 3rd letter in the rating system.
Otherwise they look about equal besides the “S” & “T” ratings. And that is a small difference.

I have the Coopers in my Magnum. There fine and OK. I just drive the car around. It is not a burnout machine or really very quick in any sense. I feel the Coopers could be a little better in the rain. I back it down a bit in the rain.

Have you have had or have now (?) the Coopers? So, why not give the other a shot?
Just wondering.