I am what I am & I am who I am.

English as a Second Language English Vocabulary, Grammar and Idioms
1

“I am what I am” , “I am who I am.” What is the difference?

Many thanks.

2

I suppose they could easily be used synonymously, but

“I am what I am – a moderator.”
“I am who I am – Mister Micawber.”

3

Many thanks.