Ralfou

Is there a difference between serials that start with PG51M and those that start with 21PG5AM?

Hello there, have there been any hardware changes in the Pod Go since the release in 2020, or is the hardware sold today exactly the same as in 2020? If there have been some hardware changes since 2020, how can one find out the hardware version of a Pod Go? Thank you and kind regards, Ralf