I used to ship the old Cold Stopper or Tan pads on brake kits for a long time. And in fact I used them on the SHO for years myself. No need for 'race' pads, hell the car ran my wife back and forth to work!
However over time I had complaints from Impala owners who talked of having to pre warm the pads a bit to get them to work in the wet. Seems we didn't have much of that problem in Phoenix...LOL!
The thing about some of them is not only compound but from my seat a grooved pad. The T pads are not. All the others are. This, like a rotors gas slot, helps prevent pad hydroplaning. Think about it. And a pad with more bite will be better as it is more coarse in nature.