my opinion on this
Warning: What follow is my opinion... and is only my relative subjective truth and is subject to change without notice..haha
My personal thoughts on this.. and I can definetly be wrong is, that Creatine should not really be ingested with powerade preworkout. I would think that Creatine would be fine with powerade after workout, as powerade contains a faster burning carb that will give you an insulin spike, and would be best reserved for after training. Unless you are lifting over 30 mins I don't see a reason for drinking it during a workout. As far as I know, there is no "special flavor" that is better than another, they are all the same.
Hopefully this helps some. Perhaps someone else has a more "definite answer"?
-T