Agnostic and atheism are the same in my book, the choice of words only tells me something about how evasive the individual is.
Atheism says that the non- existence of God can be proven.
That is a significant difference.
So; are you a Mono-theist, Tri-Theist, Poly Theist, or what?
And just how SURE are you on the exact Number of Gods that have existed?
As an Agnostic, I have ruled OUT any number Larger than 1.