The range is greatly increased. Now it's at least 80m. That's more than enough for such a small car. At such a distance it's hard to figure out what way the car is pointing.
It doesn't seem to drive faster than before. I'm a bit disappointed in this.
The original controller was of a very low quality. The steering of left and right didn't work well. It's easier to control with the app on the smartphone, although that one lacks tactile feedback.