Difference between bq28z610 and bq78z100

Hello,

at first sight, the data sheets of the bq28z610 and the bq78z100 are fairly similar. The main difference that I was able to spot is the HDQ communications option. It is mentioned for the bq78z100, but not for the bq28z610. Is this in fact  the main difference, or would there be others?

Thanks in advance

Jörg