before wavetrac: upon heavy throttle, right rear tire lights up, car slips right without moving forward, stabilization software applies brakes, car bogs down, software lets go of the brakes, you are sitting there watching people smirk at your inauspicious st vitus dance.

after wavetrac: upon heavy throttle, no tire lights up, stabilization software is MIA unless you've modded the car or have bald tires. IF modded, then stabilization lights blink briefly and car stays in straight line. No dancing just going. If you floor it in first/second in a modded car, then both tires spin but as long as you're pointed straight ahead you can let off the throttle a bit and all will be well mannered.

Others may have differential experience ;-)