Driving rear- and all-wheel drive GTS versions one after the other is enlightening. If you believe powering the front wheels spoils right-foot driving or contaminates steering feel, you're dead wrong. Both cars will swing around with a big punch of the throttle. The difference is that when you creep up to a Carrera 2's limits, a little more throttle rotates the car. That's fine, but more push just produces more rotation and you scrub speed.
In the Carrera 4, when the limit comes up and you apply more throttle, the car pushes the power around and figures out which end can best utilize it. It keeps accelerating while the rear-driver is putting on a drift show. You can get the C4 into a four-wheel drift by adding throttle gently. This will cause involuntary yodeling and rally-induced smiling that will last for days.