While running the same seed will always produce the same map, don't expect it to come out an identical clone.

I've run the same seed multiple times and can speak from experience that while the location of dungeons will be the same, the interior generation is not Same goes with the lore stones. You could have a 'boar stone' next to the starting point on the first generation of the seed, for example, but next time you generate the map it could be the one about falling trees. Same for the random abandoned houses; a beehive will always be in the same spot on the map, but the house it's in could be completely different. Just ran a double of the last seed I liked to re-run the swamp crypts while I could still remember the lay of the land and even noticed the draugr village outside had a different layout as well.