Me, me, me, me, me too!
Never had the whole "knew I was always a girl" thing (and I'm not even convinced that is the typical trans narrative anyway, although it seems to be the media's popular trans narrative because it's more sensational.) But did have (and still have) very strong "I wish I was a girl" feelings throughout my entire life, so strong eventually that I had to do something about them or I was going to kill myself. So I'm doing something about them, up to and including GRS, and it's soooooo much better this side of the fence.
Not sure there's much of a difference in the actual cause of this - "born this way" or "desperately want to change" - but more that it's a difference in how we perceive and interpret those feelings. For some, they feel it's as if they are actually a girl, and for others we feel this overwhelming desire to be female. Two sides of the same transgender coin, really, but stemming from the same stuff inside.