Tough call, I think BH DTL is the most destructive shot for both of them, but I think Myskina's is just a bit more reliable than Anna's - that said, I think Anna uses CC angles better off the BH... Overall I give the BH badge to Nastya - just because she was able to hit through top players with the BH more than Anna was. I think Nastya having better speed and footwork than Anna really helps make the difference as she was better at being in the perfect position to hit the ball, which makes the shot more effective more often. Anna reads the game brilliantly, but isn't as athletic as Myskina, so more often takes the shot on when it is harder to execute.
Annnnyway, they both had/have ace BHs
Good post. Are you still following women's tennis by the way? Anna isn't playing. Who you are rooting for now?