I have a Con 09; I have never skied the 11. That said, the 11 is a GS ski while the 09 is an 12meter SL, so I would imagine the 11 is better at "speed".
On the other hand, if turning is what you like to do, the 09 is great. I have used it mostly in reasonable crud, some modest pow, and trees. Occasionally on groomed, too! This ski is very, very nice in these conditions. Since I am not into speed I can't tell you about that. Others have leaned towards the 09 because of the "fun" factor, which it definitely has. Look at the 09 has a softer Head super shape with all the good characteristics of that but without the need for speed it demands.
If you are looking more towards GS, while I don't know or care about the GS market too much, there are probably better choices than the 11.