i think Fe in general is more aware of the situation/context. we will withhold saying something even when we want to more frequently than Fi types. and quite unlike them we almost ALWAYS want to.
i think Fi types tend to reveal themselves at seemingly more random and less socially determined moments than Fe types. perhaps it is more about how they feel right now and if they can hold it in than it is for Fe, which pretty much always feels the need to express itself.
i don't tend to reveal myself that often bc i am extremely aware of the socially appropriate inappropriateness of the occasion, bc the people around me won't understand anyway, and bc i am tired of hearing myself talk talk talk. i do not want to burden other people with my problems unless they can truly help me in a way more significant than giving me a sounding board for my own voice (ie provide some insight, etc), or for just opening the dam and letting me talk myself into coma. it's pretty shitty to make other people listen to you all the time, tho secretly i think that's what i want to do.
Fi types, in my experience, often feel they need to work thru it on their own. they just don't feel the need to share when they won't get anything sent back to them over the net that helps clarify their own feelings, position, etc. it will be translated once, and then they'll have to translate it again before they can use it. and most of the time it's very frustrating bc it doesn't take into account their specific subjective values that are shaping the conflict in the first place.