Being "10 ranks higher" is not at all a good reason to choose program y over program x. Choose the program that will be the best fit for you and be able to give you the resources you need to be successful. If you think program y has a much stronger core faculty in your particular area of research, then that's a good reason to go there. If you think their courtship style is similar to how they would be towards you as a grad student (y: hands-off, unavailable, unhelpful, not a lot of funding for conferences.... x: readily available, very helpful, very engaged, lots of grad student funding...) then that is another important thing to consider.
Regarding your actual question, I think that most programs will fall somewhere in the middle.