Hey, I am currently living en-suite East Slope. If you are thinking between only townhouse and en-suite in East Slope, I would recommend en-suite. The weekly rent is different less than 10 pounds. All doors are fire doors, and it is not very convenient to come back and forth everytime through such door, carrying your card key just to wash your hands or something.
By the way if you are interested in already living on campus earlier than September, you can do in my room. I will move out.