Build for Netgear R7800

Thanks for the great work with this (and others prior) router.

Your dropbox has 4 different builds for this router

I think I get that the last (owrt1907) is the one I want to install today to replace the 'generic' 19.07 I installed. Can you explain the difference amongst the group of 4 and explain why I might want to choose one of the others?

After reading through (most) of the 2300 posts, I'm more confused than clear on the distinction.

Thanks.

I'll save my stupid questions - like 'does it need to be plugged in to work' for another time .

Andrew