I would keep the one that shoots better, and that may be the Finn, if the bore is real good. I assume the Russian is a hex receiver from the date, and those are climbing in demand and value over the round wartime receivers. So actually you ought to set on both of them for awhile. The Russian ones will have to dry up sooner or later. And when they dry up as imports, and disappear from the shelves, wait a year and then check what it is worth.
Your gun is like your nose, it is just wrong for someone else to pick it for you!