When hiding a field on a persona, it will hide the same field on all personas at the same level in the hierarchy. This makes personas usability a little difficult in the example where you want to capture/demonstrate different information for internal and external users.
Agreed on this. For example, if we have a 'quote' for one persona, but not a 'quote' for the 2nd persona, we should able to 'hide' the 'quote' field only on the 2nd persona. Otherwise, it's a blank 'quote' section on the 2nd persona, or else there is no 'quote' section for both.