Yes. there is.

So is like therefore. Also is like in addition to. Example:

I didn't sleep, so I am tired. But I also didn't eat, so I am hungry

"So" indicates on consequences or results. "Also" gives an additional Information.

After so, you write a result of a thing. After also, you make an addition.

<em>I don't like apples so I don't buy apples.</em>

<em>I like apples. Also, I like oranges.</em>