Does the Queen like The of Duchess of Cambridge more than Camilla?

I don't think the Queen would want to make a comparison between the two. They're very different - in age, background, and the circumstances of their relationships with their respective husbands. I'm sure the Queen would view them fairly, each according to their her individual merits and/or less appealing traits. I think she would be concentrated more on 'usefulness', 'appropriateness' 'service' - rather than on subjective 'liking' or 'disliking'. And I'm pretty sure that these women would work at their roles, would behave, and would be of service, equally as well as each other. If she DID have any preference (as a mother and grandmother) NO-ONE would ever know. (Maybe Prince Phillip and a few other close family!)