My theory is that 9210-VB and 9210B-CG are the same chip, factory-configured with one-time fuses. So firmware is the same for obvious reason. 9210-VA is an older chip, not manufactured anymore.
JEYI i9 GTR case, for example, in 2020 batches had 9210-VA («A» f/w) chip inside, and in 2021 batches...