Just chiming in right quick:
“aa” as Charlamagne Tha God has said is a term of endearment while “er” is hardly used in the same way as it is usually used in a demoralizing way. There is a clear differences in the way both is used.
That’s all I have to say on the matter.
What about white people using the former?
Don’t mind it at all
Are you black?
Black, White, Puerto Rican, Irish, Hungarian and Jamacian