1650 firmware - newbie question

Can you please tell me what the difference is between BCHC and BCDC firmware?
I’ve got BCDC firmware installed on my BenQ 1650. Should I update it onto BCHC, which is newer?

Kind regards

BCHC is the newest but some experienced users who tried it are not very happy with it. In my opinon, you’d be better sticking with BCDC at least for the time being.