Kmart seems to be running the better deal, if only because the sets are generally 20% cheaper there to start.
A word of caution though, I recommend reserving clearance items at your local Kmart ONLINE ahead of time. I've run into other situations where my local Kmart wouldn't honor the online price unless I had ordered it via their ship-to-store policy. It's not that they were out of stock of the item I wanted, they just weren't selling it for the online price unless I reserved it. Go fig.