With KeePass you can open multiple instances/databases. This is especially needed when using group databases. It seems that this isn’t possible with KeeVault.
Another way to go about delivering this kind of functionality (shared/group credential storage) would be to have the ability in KeeVault to create Users and User Groups, which can then be given access to credentials based on credential tags/groups. This would be a kind of KeeVault for Teams/Business, and would be a winner product!