I do not think I am very different online, but I feel that someone else would have a better view of that.

It feels more genuine to me to communicate online via boards or email, or even texting. I've lived with depersonalization and derealization most of my life. For me, face to face social communication, especially where high emotions are likely, tends to 'activate' my DP/DR.
(& I just realized that, thank you elevatedsoul ).

So in some face to face situations, I end up feeling disconnected from myself, my emotions, my body, the people around me, and my surroundings. Whereas online, I remain 'intact' during interactions, if that makes any sense.