Once set up, the two accounts can be joined in an "Amazon household". That way both dots are accessible by both accounts, by saying "switch to A's account" or "Who's account am I in?" Different skills can be added to each account, like my pandora for my account, etc. My wife and I started with separate accounts, but we just leave them under one account now due to numerous skills or subscriptions. It's just easier for us to have everything uniform.