So, Joann, have you tried a Stack 'n' Whack? The cutting and piecing are about the same, but use different sorts of prints [fabrics] to get the different looks. I love both! I have been a Bethany Reynolds fan for years now!! I even took a Quilt University class from her. I think quilts of that era are on my webshots pages. In fact, the butterfly print I used for the class project was one Bethany had also and we discovered that it wasn't that great for a Stack 'n' Whack quilt. So she learned something also. [i need to look at the quilt to remember what the problem was....]
Stack 'n' Whack quilts use fabrics that are bold, colorful, novelty.
One Block Wonder quilts use a print with a "limited" palette.
So both are fun. I think the hardest thing is not spending thousands of dollars on fabrics that fit both methods! I may not have spent that much money, but I still have quite a few fabrics I can use for both these methods.