Interestingly, I just spoke to TESLA regarding this. If you look at my signature, my vin is quite low as well and it has previously been confirmed that my car does have USS! The advisor did a quick check on the spec of my vehicle and it does come with RCCB cameras. He then did a check on a vehicle which does not have USS, and he confirmed that the cameras were the same. He mentioned that the helpdesk has been receiving lots of calls about the cameras, but they have not actually been informed that any new cameras have been installed yet or if they are going to be. His exact words were, your car is no different to a car without USS apart from the fact it has USS. The only software difference he mentioned was the fact that my car will use USS for park assist and newer cars will use TESLA vision when it finally comes.
He also said that they have had no word as to whether USS will be turned off in the future, but if it is, then the car will simply use TESLA vision instead of the USS sensors. Obviously this will only happen when TESLA vision is fully implemented.