Night & Day difference, a much less aggressive riding position, the lower foot position, and the sport touring type handle bars are the biggest difference. I was not sure that the riding position was going to be for me at first, nor did I think it would handle well in the curves, but it does, and I am starting to really like the riding position too. The engine is a great engine, not at all in the same league as the ZX10R, which I am sure you already knew that, but still a great engine for this style of motorcycle.