I have never seen Yoyo, so I cannot comment.
However, to compare Sarah and Raine is like saying that chocolate ice cream is better than strawberry.
With Raine you would get a lady with a wonderful, very classy disposition, and very willing to please. Sarah can be very fun, but quirky and that phone answering thing can get annoying. Whereas Sarah is tall and slim with a pretty good body (jogger) and Raine is a bit on the heavy side, but if you like to handle the merchandise you will like Raine a lot more as she is very open to being touched and handled. However, her service does not include FS, but for any guy who plays his cards right all services are available with Sarah, but her strange restriction of "no exchange of body fluids" can leave a guy wanting for more. A full pleasure-filled hour with Raine will cost a mere $80, while you will likely be shorted in your hour with Sarah, and it will cost up to $160 if you wish to get the full-meal deal.
I have seen each at least three times and if I could only see one, it would be Raine hands down. But, Sarah is one who should not be missed, at least once.