i have 2 rocket flairtip superspeeds, one has an s on the base plate, the other has the standard II underneath, now i thought these razors were identical apert from the markings underneath the base plates, but looking at them it seems the one with the s has a more flat lower profile head, the s razor is on the left on the pics, i dont know if people can notice the differances on the pics, i know my photo skills are not up to much.