sincerely, I don't have the KT7 yet, so i haven't run anything on that board and can't tell you anything accurately.
But from my point of understanding/guessing, I think the KT7 will have better performance (faster), but the Pro2 will be more stable.
I personally (yes, truely personal here) always prefer stability over performance. from what i see, at least in recent generation of mobos, the performance gap is not that large, so i always doubt if I will see that 3% increase in performance. Especially now basically most computer systems are faster than what I need, I don't really care about performance. On the other hand, I want stability. I want my system 24/7, and I don't want it to crash if I run something intensive for a long time (hint hint RC5).
So, if I were to choose, I will probably go for the Pro2, solely because of the reasons I stated above. But different people want different things, so someone might thing KT7 is good and stable enough, etc...
And again, I don't have the board yet. Wait till the round up and see