In comparison to Shotokan Karate, Okinawa Karate is different in many respects. Besides the higher stances especially the execution of punches differ from Shotokan.
While Shotokan prefers strikes from a long distance Okinawa Karate focuses on shorter distances and punches. To make them as devastating as long punches the shorter Okinawa strikes must executed in a different way. The whiplash-effect, that also becomes more and more popular in Shotokan, is the essential ingredient for Okinawa strikes. To train this effect, the Makiwara is the right device as you can see in the following video.