All I know is they both work, especially the Mean Machine for me at anyrate, at the moment. Last six games I've rolled include a 267, 245, 234, 199, 212, and a 162 (brain froze on that one....three splits...after a simple half a board move to the right I had the 234 and 245.) Can't wait for the Power Machine to come out. Don't really need it but....oh well.
Chuck