They are actually similar in the goal but I use them both for different reasons. Hister does save all of my history for desktop (not available on iOS yet) so I use it as backup to get something I wanted to see but lost. But Karakeep is everywhere and I save things there that I want to keep (it can save the actual page) and can use it on mobile ....etc (and share it too).
This is at least my workflow which can be different. Both are great tools and selfhosted.
This is at least my workflow which can be different. Both are great tools and selfhosted.