Hi,
I'm using both 11 and 9 CrazyFly sculp.
the kite cnoopy is the same for 2011 model and 2012 model, there are only changes in the bar, and better bridles and pully in the 2012 model.
as well one-pump is better.
but bottom line 2011 and 2012 act the same in the air.
for my weight, 80kg and using 132X41 Raptor Pro & Raptor Pro LTD.
sculp11 will do great job from 13-26K sweet spot for high jump above 19K
sculp9 will do great job from 16-32K sweet spot for high jump above 23K
if the wind you are going to use the kite is more around the 20-30 go for the 9
if the wind is more around 15-25 go for the 11
but the best is to use them both

Yehonatan.