it can be argued that Vaidisova's gs semis is more impressive than Ana's tier 1, but for me the argument doesn't go that way.
I said that a year ago and I said it now, I've seen both players in person and Ana is simply better, has a better forehand, a better serve, a better volley and more important, a better attitude.
I really can't see why the hype for Nicole, I don't see anything special in her game, she is not bad, she is top ten material but there isn't anything special about her game, and tends to be too pasive, not aggressive enough.
Ana on the other hand has a killer serve, good hands at the net and technically one of the best forehand I've seen, and she is aggressive, she really wants to win. Nicole gave me the idea she didn't want to be out there, Ana enjoys it, she wants to win, she wants to be the best and she has the tools for that.
In the short term Nicole can have more success, simply because her game is simple, not much to develop, Ana can be inconsistent but there is the trick, Nicole is consistent but if she faces a top player playing well, there isn't much she can do, Ana on the other hand can lose to anyone but if she is on she can beat anyone, that is the big difference, the difference between a good player and a champion. If she doesn't get injured, Ana will win GSs, I will be surprised if Nicole does.