Been on both sides of the fence, so here goes.
When married, AH had the ability to put me in the poor house. Financially I was very vulnerable to what he did. Truthfully, I did not know who he was outside of his addiction. It was a guess.
As far as AS, i knew him from birth. I know very deeply how addiction has changed him. Even his brothers aren't aware of that as much as I am.
There are other differences, but these are the ones that come to mind at the moment.