I have not made a OBW, but have done a couple S&W. After seeing photo's of OBW, I am thinking the concept is the same, except the S&W ends up with seperate blocks, which I like, and the OBW has nothing seperating the blocks. Some of them are beautiful, but seem rather busy for my taste. Google Bethany Reynolds S&W. I have her 1st book. You will see the differnce after going to her site, and looking at some of the lovely OBW here on the board.