AC versus EB series

I am interested in what features or components make for instance the EB series one group, and the AC another…are there shared internal components, is it just earlier versus later designs, common feature sets?
I have an EB70 and am just wondering besides amount of watts available or size of the inverter whether there are some additional factors to be considered between the two series.

It seems to me that the EB series is intended more to be a rugged, tool oriented line while the AC series is a little bit cooler with more bells and whistles. This has kind of blurred with the EB70 though as it seems to have incorporated some of the AC style (wireless chargers, etc).

According to a post by Bluetti some time ago, the letter codes simply indicate which design group within the company created the unit.