I use the flop almost exclusively now instead of the pitch, and far more than I even use the chip at this point. I am not holing out or giving them the same type of run at the hole, but if you get good with it, many times it takes bogey out of the equation.
I really dont think they are that far off in terms of spin, as I use high spin balls and high spin wedges and it does make a huge difference. As mentioned in the other posts, the back spin/top spin does make a large difference in the roll out. Same thing with wind and green speed/pitch.
Unless Im thinking of the wrong side, #9 at KI has quite a large mound on the right side of the green so I imagine it would not be too receptive to hitting a flop shot from that distance coming in, although I could be wrong as I usually miss left...or way left to be exact. P)