If you like them, and they both lock up tight,,buy both of them for those prices.
Live with the minor pitting,,repair the stock so it doesn't become a disaster in you hands and have fun with them.

Maybe the one with the excellent bbls can be fitted with the good stock from the other example with the lightly pitted bores.
Might take a bit of work but who isn't up for a project.

Put the other shotgun back together with it's lightly pitted bores and now cracked stock and sell it for $100.
You have a good one for $200 and some work.

I know they were all hand fitted,,,
They were entry level shotguns, but nicely made ones at that.
Nothing there a bit of skill and epoxy can't remedy.
They could probably use a touch of glass bedding at this point anyway in their life.