As you note, her takeback is a little different. Would you say she has a slightly more extreme grip than Gasquet? She seems a little more closed face than his stroke...
Also, she doesn't generally have as extreme of a follow through as Gasquet or Wawrinka (though they don't have exactly the same follow through either). This may have to do with her rotating through the shot a little less than them and/or could have something to do with how these players use or don't use their wrist?