The AP stratus 3.0 has alot of front grip, however on anything from meduim bite carpet and above traction wise I would be weary of using it since it screws the front end of the car into the ground, robbing corner speed and boggin down the car. The mazda 6 has alot of front end grip, however i have always found it to be really twichy and then as soon as it starts to turn, push really bad from the center to exit of the corner.
For meduim to high bite carpet the parma alfa is the body you want, with alot of very smooth easy to drive steering.