First of let me start with saying that anyone of us who is trans, is so, regardless of "where" in his or her transition. No one is more or less trans.
Having said this, each on of us is unique and has different ways of dysphoria. For myself my GRS was so emotional and life saving that I do consider this my re-birth. So October 4, 2017 is my new birthday.
Other dates are also important, like when I came out or started HRT, but they did not have such a great emotional impact as my GRS. Again, having or not having GRS doesn't make any of us more or less.
Hugs, Erin