I like a mix of both as I really like the angled knee but I think you should have let the other leg be the same as in the other picture. With a few water perls it would look more dynamic. Otherwise do I like them both. This one is more dynamic in itself and the other looks as if she is leaning to her front but doesn´t fall. A real balanced stance. =^.^=
In this version it really feels like she is in the middle of a leap, dancing across water, very much like Fi in skyward sword when she is giving a message from the godess. I like the way she is positioned in this version better too, the angle feels a bit off in the other one, here she "flows" better with the background.
the second's pose is nice, better than the other one but not with this camera angle. I like the color and contrast more than the first one but i think the the first one is more balanced so i think the first is better...
I like this second version more, it is more dynamic, lively, and implies motion (whereas the first version looks somewhat rigid), it goes along well with the movement of her upper body and cute playfully happy expression. Overall, it gives a playful and happy dancing feeling.