I don't think the girls' vote is or will split, they are both very different and have their own voters, it's just that with Ray he's so superior to the other guys there's almost no point voting for them other than to get them to a certain point. The same is true of the girls but they both have their own styles, as well as being female, whereas Sam and Kyran, while good, are just inferior Rays in some ways.
Whatever the final outcome I suspect Ray will nab it, unless Beth is heading the vote! I don't think for one second Hayley will win unless there are some miracle performances in there - though the Charleston routine and a decent showcase that really highlights her strengths would be formidable. That's if she gets through next week.