One is a matching Yugo 59/66 that came with the log indicating it was never issued; only checked over and is in pristine condition. The other is a matching KBI imported Tula Russian that is also in pristine condition, came in the original importers box, but obviously has no log and has no factory refurb marks.
Is the date in the book the date it was built, or later. Yugoslavian books were chucked during a refurb and a new book issued, while it may be unissued in its current state, it is not technically unissued. Why rebuild a never issued rifle, it was issued, used hard and then rebuilt, it's on it's second life. And I bet the Russian has had something done to it, at least a through inspection, they just didn't pull it off a storage shelf, box it and ship it.
Romanian wood can vary wildly, some are just bla, monotone, hohum hunks of wood
Others are just like...POW....BLAM
One of my favorites, a 1960 just like the OPs, just to show how wildly mismatched one can get, it has nothing matching, not a single part, even the rear sight leaf is mismatched. I got a whole collection of serial prefixes and numbers and a Yugoslavian bolt, a nice beat to death stock, and I wouldn't trade it for another. It's a Johnny Cash rifle, One piece at a time SKS