From what I've personally read online so it's probably not accurate my understanding is the two seem to often be comparable. However repressed emotions are emotions that you've felt but you pushed away so you don't deal with them. That's the kind of emotion build up that seems to be behind a lot of hurtful things. Dissociated emotions is more of a protection for the psyche and the person does not always behave in an expected way to a given circumstance. Like a puppy being hurt may only stimulate a numbness but nothing negative or positive. They come across cold but really they can't associate it to an emotional response. Like I said this is my understanding and everyone and their pets can correct me because I have a feeling that I'm wrong since I'm not fully understanding either.

Was going to say something else but I forget now {reads what they typed again} Oh yeah! Both repressed and dissociated emotions can be treated. The repressed one can learn to let his emotions show in a structured way since many of them hold it in because of the fear of hurting someone. The dissociative one can learn how to "feel" their emotions and get past the numbness as well.

I hope I didn't just confuse you more and do understand there's a good chance I'm misunderstanding this myself.