John, I also just got some RSM props in also. They look close, however the BY&O still has a wider blade. The wood used looks differant, the finish is the same in texture but I havent measured the pitch. Eric Rule says that they spent a good amount of time developing the exact aerodynamics of the blade however you need to try both and compare. I have yet to see a "Super Prop" one design does it all. I compared the 10X6 props.
Wayne