you can use the same database, at least with TFS, each account can be used for both worlds, characters have a column for "worldID"can be with different database?
i don't know much about web ACC, but if you have use subdomains, like server1.website.com and server2.website.com and if people go to www.website.com they get a picture link to either server pagedo you know all the steps to create the two servers? on 1 ip with different websites /?