None. I just believe whatever god is, it exists. But it can be useful for me. But Hinduism believes that whatever you do, be it a good deed or be it a bad deed. Submit it to God, and submit here doesn’t mean that you got rid of your deeds, we believe in karma, it’ll stay with us. But the point of submit here is that you detach yourself from expectations of outcomes from those deeds. So if you do good karma with expectation of good rewards, it’s not best karma. It is still good karma but keeps you selfish. Instead you do karma, you submit it to the god that is apathetic so you also don’t expect rewards. That allows you to be in a state where you can truly choose to do what’s right or wrong.

To me in atheism, there is no god and your own morals are something you make entirely. In Hinduism, for me, above still remains true, but I can use the construct of a god, as a help to check, if my morals are good enough, even if after I submit all my karma to god, and I don’t expect anything in return, I still can choose to do good karma and that’s what’s important to me, because then I can personally feel, I’m a good person truly.

Nor am I a good person because I’m afraid of consequences of being bad neither am I a good person because I’m expecting rewards. I can feel good about myself because I am trying to he just good.

Tldr; difference existence of God makes for me, is it helps me isolate my fears and expectations, and strive to be good regardless of either.