I can tell you that if you've never attempted a different dialect, DO NOT try before you go on an audition. As long as the acting is good, it won't matter. Also, stay away from Neil Simon. Every Simon monologue is so overdone by this point, it's not even funny. (Just to clarify, I'm not saying I don't like Neil Simon because he's a genius.) Just my two cents.
"Noah, someday we'll talk again. But there's things we'll never say. That sorrow deep inside you. It inside me, too. And it never go away. You be okay. You'll learn how to lose things..."