Is there a difference between NAD MDC BluOS 2i and BluOS 2 (without i)

Hi Roon friends, I have an good offer for a NAD C388 with MDC BluOS 2 (without “I”). Is there any hardware difference or is it only an older naming. I am not able to find something about it.
Thanks in advance

As far as I know the 2i version supports Airplay 2 while the older version does not.