Wicked little cars.. I used collect load of these sort of car years ago but I stop collecting but I still have load on the loft.... Also what happened to the airsoft channel
The torque of an inline motor tends to make the car tip sideways a small amount under acceleration, whereas the torque of a sidewinder motor is applied to the rear wheels, forcing them into contact with the track, giving better the car better traction and more speed.
An inline motor distributes the power or torque equally between the two rear wheels and is more realistic to a real car, whereas a side winding motor puts a little more power to just one of the rear wheels. Which is why it will never be as good as an inline.