One of them is replacing the channel known as "Love" -- which has a softish AC/pop classic hits format. A good number of the songs regularly played on that channel aren't played anywhere else on the service. The other is on "Spotlight," Channel 4, which is usually sold to labels to hype artists who have new albums coming out or tours starting.
Come December, for a few weeks each, a couple of channels will be pre-empted for "holiday" music. No '60s and '70s soul on Soul Town, only Christmas music. No '80s and '90s country on Prime Country, only Christmas music. Some of the "missing" soul hits are also played on their appropriate decades channels, but fans of that period in R&B are out of luck if they want to hear a full playlist of soul hits on a dedicated channel. They're better off than the fans of '80s and '90s country, though, whose favorite music goes into hibernation while Garth, Trisha, George, Reba, etc. sing only of snow, Santa and occasionally a child in a manger.