I have reviewed Danielle and there are more reviews out there on her. I had an excellent session with Danielle. She gave a great massage, was very erotic, loved the reverse and more. I would highly recommend her.
I have had the incredible urge to see Brittney for a long time. I finally did so last week. She is gorgeous. She is in very good shape and those bolt-on's are exquisite! She gave a very nice, erotic finernail massage with lots of lovely teasing in all the right places. She has a nice personality and her finish was great. She is not as open as Danielle was with me. Maybe that was because it was my first time with her, I don't know. Check the other reviews of her to see if they agree with me or not.
As for a duo with the two of them, I would check it out with them first to see if they are compatible. Sometimes what looks good on the outside does not work in the room, and you don't want to waste your money for an average time when having a duo.
Take care.