All the Golf's times were set in the wet, too!
Guess that's exactly the point with 4wd cars, unless extremely overpowered they simply feel slower and you really need to push the to loose the image of control over safety (I drive a 400bhp awd and always need a reference to make me realize how fast it is, without this the average speed always is a lot above that of an equally powered fwd car.
They are both good cars but the golf irl will be quicker unless the cupra is taken to track under perfect circustances (but slower or not the cupra would be my choice).