I’ll be honest I haven’t played Coc 1 so I don’t know the endings there. All I know is that Savin said coc 2’s ending will be like Fallout’s, with the fate of each area as a whole and some characters I believe.
( I do know of a few characters, whether they are real or not in coc 2 is up for debate. I still want to murder them. Viciously. )