With teenage girls I would definitely go with the 1 BR Villa. The extra space is amazing. YOu have the living room for relaxing during the day and the full kitchen is great for snacks, drinks, water, breakfast etc. Having the washer/dryer really helps with packing. It is so easy to throw a load in and have clean clothes in no time.
Have you looked at the possibility of a Villa at the BC? With the BCV you would also have access to SAB
I would definitely go wth the Villa.