From what I’ve seen, it is true that the Chicken Ranch ladies tend to charge less for parties than Sheri’s ranch does. That the ladies are independent contractors doesn’t mean that one brothel’s ladies don’t charge more, and the brothels may even influence what the ladies charge, though the ladies have the final say because they are independent contractors.
That said, I think the price difference is entirely justified. Sheri’s Ranch tends to have the higher quality ladies. A few of my favorite Sheri’s Ranch ladies started out at the Chicken Ranch, but moved over the Sheri’s Ranch. None of my favorite Sheri’s Ranch ladies have moved to the Chicken Ranch.