Since I have played with both of the mice I would like you to know that the 1.1 sensor is alot better than the kinzu v2. I've tested it with several different mousepads, for example Razer Goliathus, Steelseries S&S & Roccat Taito. During the test I was trying to get the mouses to "skip" while doing a fast 360 move. The 1.1 skipped a little on the Goliathus but that's the only mousepad I was able to make it skip on.
To talk about the kinzu I was able to make it skip on QcK Heavy, Roccat Taito mTw edition & Steelseries S&S. I also found out that the 1.1 sensor tracked pretty awesome in comparison to the kinzu v2 in terms of clean moves and so on. The kinzu kind of wobbled while turning and aiming.
I would really keep the 1.1 and sell the kinzu. If you want a mouse that is more like 1.1 I would really recommend the Zowie AM which tracks really well on all mousepads I have and it never "skips".
Bad luck, i am using v2pro and it never tracked bad, neither i had any problem with it. It have pure tracking both on roccat taito mtw and qck +, i also have zowie AM but I find kinzu v2pro more comfortable for me.V2pro only did a negative accel once when I literally raped mouse with fast movements (zowie AM didn't :) ).I would like to add that i play on 400/400 cpi 500 hz 6/11 win speed and 3.1 ingame sens. 1.1 may have good shape and all, but his slippy surface,125 hz default (for some lans where i can't boost hz to 500) and scroll bug make him little bit inferior to v2pro/kana. Qck + and v2pro are perfect couple.