I think this might cause an issue if both servers are running. The server client seems to keep player data stored in RAM and will write it to disk on a later sync, or on shutdown. So if both servers were online, and you hopped from one to the other, later the data will be over-witten from the old data the original server had. If you are online on the second server when the first one writes the data to the file, it could easily cause corruption to the data. Best case your character data just gets rolled back a bit.Yes, you could syncronize the Player folder on each server.Can one character be the same on two servers but on both servers use the same mod? Is it like 2 server branches using 1 account but different maps?
There is a server called Amelia that advertises on 7D2D Discord that runs 4 servers using this method. (4 biomes) I haven't tried it but might. It must be some active type of syncing where new data always wins over old data.So if both servers were online