That sounds like the upgrade version for the 396, which isn't the same. If that's also the version for the 246, then let's see whether other 246 owners jump in and say whether it's worthwhile to apply.
As for rebanding, all the manufacturers have yet to release details about how they're going to handle rebanding. As I understand it, there are a few rebanded Moto systems coming online (or are online) now, so we must wait to see when - and how - this is going to be supported 73 Mike