Vault Store for FSA

We are running evault 9.0.2 for exchange archiving and planning on implementing FSA for a small number of our heavy users. I just have a question on the Vault Stores. We already have 2 for the Mailbox and Journal stores. Is it necessary or recommended to create a new store for FSA? I've been searching the support site and haven't found anything on this. I don't understand if Excahange and FSA would share a Vault Store or if they should each have it's own? It seems to me I should be creating a new one for FSA but just want to confirm that before proceeding.

Thanks for any input.