I agree Anna (and most top girls in the field) are very strong-minded and hard working, but I also don't see Anna is more determined than Sasha, Alena or Rika, not evidently - they all achieved a lot along their short career already and they all failed/lost from time to time too.
I reached my conclusion because I believe forces of nature

A strong mind won't offset growth of weight/height etc. If you don't have good techniques, relying on a light body not core strength (that's how I saw Anna), it's easier that you fail at end of the day.