Corky's styles do seem to be created by the same designers as SpringSteps. If I did some digging it probably is the same manufacturer generating two similar brands. The difference however is not only price, but SpringSteps are much better constructed. Corky's tend to be a little firm with not much flexibility and support. SpringSteps are very comfortable. Corky's is also cut a litle more narrow. Unless you have serious feet concerns adding your own pads (such as Petals) may help make Corky's more comfortable.
I think Corky's make some cute shoes, but in recent months my feet have become victim to somemajor medical issues and therefore I can't wear any brand of sandals or clogs at all, and have to be extremely careful with my enclosed choices. If this were the good old days I'd be unable to wear anything other than those awful orthopedic shoes of days gone by. Thank goodness shoemakers finally figured it out that there was a market for stylish comfort shoes.