OK...

A clone in my example is an exact copy with the same life experiences, likes, dislikes, friends, memories, etc..
The clone would remember the time that little Timmy Brown pantsed you at the school play when you were two and feel the shame and embarrassment.

A twin would remember the event as an outsider but and would empathize with your shame and embarrassment but would not feel it or remember it that vividly or in the same way.