Wafer, I think it was, was one of the first to offer softboxes that supposedly didn't have "fall off". While portrait photographers don't really care, and in fact like the fall off, but people who photograph food and products want a perfectly even distribution from side to side.
I have a number of different "softboxes", and some reflect the light coming off the head back to the back of the box, while others have diffusion in between the head and the diffused front. Others just use the front panel.
Wafer, I think was the first softbox that was not anywhere near as deep as Chimera, Westcott and Photoflex.