There was a long drawn out thread that turned a ridiculous petty argument and it was closed. On the surface, price and weight are the main differences between the two current stock models. The rest is mostly aesthetic and really its up to the artist using either or both to say what they like better.

There are not many people on this forum who legitimately own both machines its mostly one or the other. I have not seen the Keith Ciaramello rotary Review DVD but from what I understand he reviews both and might give some insight. Outside of that any claims made about either machine be it by user or manufacturer should be taken with a grain of salt.