You're taking it to the wire! Have you made up your mind yet?
If not, I would try and discourage DD from choosing based on friendship as these really are very fluid once you get to Secondary. If that is her only reason for choosing CH she could end up feeling more distressed further down the line. It is perfectly normal for the DC to have a few wobbles.
You are in a better position to view the issue dispassionately. Do you feel there are other good reasons to choose CH for your DD? I know distance isn't a problem so I would be trying to persuade DD to choose whichever school you feel is the best fit for her.
One at each would certainly give you a great perspective of the two schools.