Yes, I think Vicky was the definite favorite, or as favorite as a child of QV's could be (not very, that is). But I think a lot of it stems from Albert's adoration of his eldest daughter. I don't think QV would have been half as inclined to get along with Vicky if Albert hadn't been so crazy about her. I mean, both women were very strong willed.
And on a different note, it's pretty amazing how similar Beatrice looked to Empress Alexandra in old age.