There is a difference,
"God is not real. Earth and humans were created by nothing!"
Athist
"I don't think god is real. I just don't understand if I can't see him or any proof of him."
The second is a little more agnostic than atheist, agnostics say their might be, there might not be. they can lean one way or another, but it's still agnosticism.
It's not the same thing. Here's an example. Babies are Atheists because they do not believe in god. They lack a belief. You can't say they believe there are no gods because they are unaware of the concept of gods.
I don't think babies are considered atheists... they barley started thinking, they can't be held accountable for anything.
ok then, explain how your beliefs make any more sense
God made everything, even science. And Time. Since he made science he can freely interfere all he wants, making miracles. Since he created Time, it does not apply to him. Therefore he needs no beginning, and no creator. Makes more sense to me than an explosion from nowhere.