Did you also post in another thread?
If you can, I would highly recommend visiting both of the universities. I know that they are not very close together, but you can get some good deals on the train and it would only take about 5/6 hours to get from one to the other.
I happen to live in Kent, have visited the university and also go to the University of Hull, however I haven't been to the Scarborough campus so I can't tell you that much.
Canterbury is a really lovely city, it's a typically English place with lots of very old quaint buildings. I haven't been to Scarborough but I hear that it's also really lovely. It will also be cheaper to live in because it's in the north. Hull University has a really good business department so I'm led to assume that it will be the same standard on Scarbourough campus, but I can't tell you what it's like at Kent.