I am prefacing this illustration by saying I am not in any way being glib or insensitive, but I see a parallel in the two situations.
When I was divorcing, a friend told me that losing someone in divorce is harder than losing someone to death. In divorce, that person goes on and has a new life that doesn't include you. One might look back and wish they had chosen a different path or imagine how things would have been different had they chosen to handle things in a different way. Point: it is a choice, opportunities to second guess the decision and face guilt are enormous. In death, there is closure--no choices. In death, we believe that we will be reunited with our loved ones and will have a "relationship" on a whole different plain. In divorce, that's probably not likely.
Both are filled with grief, loss of control, and just plain pain. But, I think the illustration, perhaps, can help us better understand how they are different.