Bitch-of-all-trades
When a person assumes they rank higher on all personal, professional, and social levels of "perfection" that no matter what you have said, done, or experienced, they will always tell you how they have said, done, or experienced it better or more significantly than you have. A Bitch-of-all-trades can easily be identified with responses that begin with "Well, no..." followed by their statement of superiority.
"I was telling Sharon how difficult giving birth to my child was and how I was in labor for 53 hours. But, being the bitch-of-all-trades that she is, she had to one up me by saying "Well, no...I was in labor for 54 hours and my child had to go to the intensive care unit at UCLA."