Saving preset rules to the game's generation (more trees, less carrots more berry bushes and ect) when you save doesn't seem to save to transfer the same rules to the other world you create.
1. Go to host server
2. create a whole bunch of different stats for each generated entity in both world setting and gen uptions
3 save it as a preset name it and give description
4.1 try to apply it to other world you're creating and check the options
4.2 generate the world to see if there's any difference between default generation and settings generation which did not save