FYI
During map generation, the seed determines the biomes and POIs
During game generation, the game name generates the lootable containers.
So if you generate a map called TestRun1234, it will always look the same in terms of biomes and POIs.
However, game name TR1234 and TR5678 will have slight differences in terms of loot containers. Just by changing one character (for example TestRun1 and TestRun 2), you will see differences if you spawn in at the exact same location. I noticed a difference in cars and trash piles when I spawn in on the same map at the same location, but used a slightly different game name for each one.