There is not much difference between de Sidewinder and the RS80D.

But the Sidewinder to me looks more durable and the casing is much better. The casing also reduces interference in the robot a lot more than the RS80D.

Apart from that the RS80D is heavier than a Sidewinder.

But it does have an AUX channel so that is a plus for the RS80D.

That and its price that is pretty good make the RS80D a nice controller. But I still prefer a Sidewinder.